Hello!
Reviews are required for features, but are still useful on everything else. It is okay to merge trivial things without review, but I’d wait a little while for a review if it’s not urgent.
It’s good to backport docs changes to bugfix branches, especially to the branch whose docs are at 3.14.3 Documentation – we don’t need to wait until the next feature release to put docs improvements in front of our readers.
To backport, add the relevant “needs backport to 3.x” labels (I recommend to 3.13 and 3.14) and the bot will attempt to backport. It will tell you if it can’t do it, usually because of a conflict, and will give you the commands to do it manually.