I don't know that "immersion" is the word I would use to describe the issues. But semantics aside, the equipment stats and benefits not transferring to your wild shape are RAW.
The thing is, BG3 is significantly more itemization-focused than RAW 5e is. Gear is how you make unique builds with wacky mechanics and unusual mechanical interactions. It's a huge part of a character's power that didn't exist in 5e. Not being able to engage with that feels terrible and makes the looting experience just feel boring.
On top of that items that literally state they work in Wildshape sometimes don't. I have an amulet that is supposed to give Feather Fall when I am Wildshaped, but it currently gives Feather Fall to my caster form and the effect goes away when I Wildshape. I also have a hat that gives me an extra Wildshape charge that sometimes doesn't work, and my chest piece specifically designed for Moon Druids sometimes doesn't give my Wildshape forms the temp HP or extra AC it's supposed to give when I transform.
Which is perhaps the biggest issue right now. Moon Druid is riddled with bugs. The ability that lets your attacks ignore mundane resistances simply doesn't work, cutting your damage in half against most enemies at later levels. You can't Rage or use Action Surge while in animal form even though you could in 5e and a lot of feats that are supposed to work in Wildshape just don't right now, limiting build options even further.
Moon Druid can't even activate their own concentration spells in Wildshape, which is a core facet of their playstyle in 5e.
