Since I’ve had so many problems with Nextcloud updates in the past, I’m now sticking with the oldest LTS version for as long as possible and won’t update until it reaches its end of life. This has really improved my Nextcloud experience. The update to major version 32 went smoothly. I only had to run two commands manually afterward.
docker exec --user www-data nextcloud-app php occ db:add-missing-indices
docker exec --user www-data nextcloud-app php occ maintenance:repair --include-expensive