Not a bug. PTB uses a separate save.

"All characters you have unlocked on the in-game store, combined with any DLCs unlocked on Steam, will be automatically unlocked."

I have my dlcs, but not the in-game things
They should be in there

also I should get the 10k auric cells to test things out or smth.
I've had problems with my save file since linking up my steam with bhvr account back in the day when it came out.

EDIT: Okay i found the aurics in inbox, so thats my fault! Not sure about the in-game store characters etc.

Hello! For this issue, note that we have updated how player saves work in PTB.

• All characters you have unlocked on the in-game store, combined with any DLCs unlocked on Steam, will be automatically unlocked.
• If DLC content has been unlocked via a platform other than Steam, it will not be automatically unlocked in the PTB. This content can be unlocked with the provided Auric Cells.
• When accessing a character's Bloodweb, the character will be automatically set to Level 50 and Prestige 3, unlocking their perks to Tier 3, as well as any items that would regularly be obtained during this process.
• All offerings, items, and add-ons will be pre-loaded with 99 units available.
• 12,500 Auric Cells and 1 million Bloodpoints will be given on each new PTB version, available to explore Outfits and Characters in the Store.

https://forums.bhvr.com/dead-by-daylight/kb/articles/533-9-4-0-ptb-patch-notes

However, since your issue also describes missing in-game store purchases we will investigate this issue further.