Visibility of add-ons

I installed HA on my Synology, but why don’t I see the add-ons? I activated advanced mode but I still don’t see the add-ons. Thank you

You have a container install.

See the table of supported features for each install type here:

It’s not the end of the world. Add-ons are just managed docker containers. You can find just about everything that is an add-on as a plain docker container on Dockerhub. You just have to manage the updates yourself.

I’m new to these topics. Are there tutorials or videos for HA on Sunology?
Thanks a lot for the answer.