Only post-update action I had to take was to handle /etc/systemd/homed.conf.pacnew, which had a cosmetic change, for me. A smooth update otherwise.
Edit: Also noticed that unlike the rest of the Nvidia packages, the update process didn’t replace nvidia-455xx-utils with nvidia-utils.
But this was easily resolved, by explicitly trying to install the latter. Pacman asked me whether I want to replace the older package with this one, replied y, and the replacement was done.