Go to Settings & privacy > Settings > Privacy > Profile and tagging to see the relevant options.
You can't completely block photo tags on Facebook, though you can prevent others from seeing tags. Manual tagging for photos and posts is still an option, however. In 2021, Facebook discontinued its facial recognition feature, meaning that the service will no longer recognize your face and suggest it as a tag in photos for your friends. There's also a risk that someone could use a tagged post to obtain too much personal information about you. If someone takes an embarrassing picture of you and tags you in it, all your friends will be able to see that picture. Facebook tagging is a fun feature on the surface, but it's also a privacy risk.
