Unforgiveable/Unforgetable Past Abortion and Miscarriage I knew a few very senior Buddhism Scholars, one of them also start teaching Dharma having an issue as per title above.
The guiltiness is persist more than a decade and the actions below i personally felt inappropriate especially being too superstitious and claim that all those bad luck due to the title above. Kindly Correct me from wrong if any statement here found inappropriate.

Body overweight and start having obesity sickness like knee pain. They will claim that the aborted child coming back and bite the knee. I thought it is as simple as due to diet issue (too much sugar and fats) and lack of exercise?

Getting a Spirit tablet for the aborted/miscarriages child and often doing offering like praying, food, toy, etc  - Personally thought the child will remain in the human dimension and refuse to get incarnation yet it will keep playing mind tricks to the person.

They will start teaching Dharma and hope the child can listen as well?


Q1) Please someone review the action above is appropriate especially #2 and #3 ?
Q2) Apart the similar question and answer and this post, should we focus more in 8 fold path as core resolution and performing often chanting/praying without spirit tablet? Any Sutta/Mantra suitable for this type issue?
I hope can have different angle and views from Theravada, Mahayana, Zen, etc. Well, those scholars i mentioned above are from Mahayana by the way.
From the sutta quote below, you can see that a person's actions while they were alive determines their outcome, and not rituals performed after death.
Also, please watch this video talk and this video talk on superstition by Ven. Ajahn Brahm. In SN 7, you can find many cases where the Buddha criticized superstitions.
In DN 2, we find that astrology, palmistry, divination, tea leaf reading, magic, geomancy, dream interpretation, making predictions etc. are considered &quot;animal arts&quot; and wrong livelihood for monks.
From SN 42.6:

Then Asibandhaka’s son the chief went up to the Buddha, bowed, sat
down to one side, and said to him:
“Sir, there are western brahmins draped with moss who carry pitchers,
immerse themselves in water, and serve the sacred flame. When someone
has passed away, they truly lift them up, raise them up, and guide
them along to heaven. But what about the Blessed One, the perfected
one, the fully awakened Buddha: is he able to ensure that the whole
world will be reborn in a good place, a heavenly realm when their body
breaks up, after death?”
&quot;Well then, chief, I’ll ask you about this in return,
and you can answer as you like.
What do you think, chief? Take a person who doesn’t kill living
creatures, steal, or commit sexual misconduct. They don’t use speech
that’s false, divisive, harsh, or nonsensical. And they’re contented,
kind-hearted, and have right view. And a large crowd comes together to
offer up prayers and praise, circumambulating them with joined palms
and saying: ‘When this person’s body breaks up, after death, may they
be reborn in a place of loss, a bad place, the underworld, hell!’ What
do you think, chief? Would that person be reborn in hell because of
their prayers?”
“No, sir.”
“Chief, suppose a person were to sink a pot of ghee or oil into a deep
lake and break it open. Its shards and chips would sink down, while
the ghee or oil in it would rise up. And a large crowd was to come
together to offer up prayers and praise, circumambulating it with
joined palms and saying: ‘Sink, good ghee or oil! Descend, good ghee
or oil! Go down, good ghee or oil!” What do you think, chief? Would
that ghee or oil sink and descend because of their prayers?”
“No, sir.”
“In the same way, take a person who doesn’t kill living creatures,
steal, or commit sexual misconduct. They don’t use speech that’s
false, divisive, harsh, or nonsensical. And they’re contented,
kind-hearted, and have right view. Even though a large crowd comes
together to offer up prayers and praise … when their body breaks up,
after death, they’re reborn in a good place, a heavenly realm.”
When he said this, Asibandhaka’s son the chief said to the Buddha,
“Excellent, sir! … From this day forth, may the Buddha remember me as
a lay follower who has gone for refuge for life.”