Apple Silicon: port all Homebrew packages under /usr/local/opt/ to /opt/homebrew I recently purchased a MacBook Pro 13&quot; with the M1 chip and transferred all my data over using a Time Machine backup. Homebrew packages are currently installed in /usr/local/opt/ but it is my understanding that they should be under /opt/homebrew for Apple Silicon Macs.
How can I:

Get the list of packages I currently have installed
Remove those from /user/local/opt
Reinstall them under /opt/homebrew

I kind of assumed Homebrew would be clever enough to do this automatically but apparently it needs some manual maintenance.
Here's my Homebrew config if it helps:
HOMEBREW_VERSION: 2.7.2
ORIGIN: https://github.com/Homebrew/brew
HEAD: dad7dc6a1498b80770d98f2d7cd6fb927c300bbb
Last commit: 3 days ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 2b1d79d038bffdbfcee93283051d48919a4caf3d
Core tap last commit: 16 hours ago
Core tap branch: master
HOMEBREW_PREFIX: /usr/local
HOMEBREW_REPOSITORY: /usr/local/Homebrew
HOMEBREW_CELLAR: /usr/local/Cellar
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 8
Homebrew Ruby: 2.6.3 =&gt; /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
CPU: octa-core 64-bit arm_firestorm_icestorm
Clang: 12.0 build 1200
Git: 2.30.0 =&gt; /usr/local/bin/git
Curl: 7.64.1 =&gt; /usr/bin/curl
macOS: 11.1-arm64
CLT: 12.3.0.0.1.1607026830
Xcode: N/A
Rosetta 2: false

Thanks in advance!
According to https://docs.brew.sh/Installation, /usr/local is for Intel binaries, /opt/homebrew for ARM. So you may want to reinstall instead of just migrating.
You can dump the list of currently installed packages with brew bundle dump. To duplicate your current installation, you'll need to

run brew bundle dump to create a Brewfile

install ARM Homebrew into /opt/homebrew by following the instructions in https://docs.brew.sh/Installation
cd /opt
sudo mkdir -p homebrew
sudo chown -R $(whoami) homebrew
curl -L https://github.com/Homebrew/brew/tarball/master |\
    tar xz --strip 1 -C homebrew


make sure that the ARM version is at the beginning of your PATH
PATH=/opt/homebrew/bin:$PATH


Reapply the brew file created in step one
hash -d brew
brew bundle install --file /path/to/Brewfile`


Optionally run brew analytics off to turn of the tracking/analytics gathering done be Homebrew (https://docs.brew.sh/Analytics)


PS: Some formulae don't seem to work on ARM yet