Artificer Maverick - Ritual caster

I have level 4 Artificer Maverick

I added feat Ritual caster, chose Intelligence as stat and it offered me to choose 6 spells.

After i choose those spells, it didn't add any of them to my spell list like ritual caster in version 5 did.

The 5.5e version of Ritual Caster doesn't do that at all, regardless of what class you are. This has been reported many times, but unfortunately they've said it's not possible to fix with the current system. They are currently working on a major overhaul of the character builder and we may see some improvements in this kind of thing after that.