Phileas Fogg's around the world would be difficult to achieve during Pope John Paul I's reign?
Let's think step by step below.
yes
Phileas Fogg is a character in Jules Verne's Around the World in Eighty Days.

Phileas Fogg attempts to circumnavigate the globe in 80 days.

Pope John Paul I reigned for only 33 days.

.

The final answer: yes