I have the issue that some DLCs are not showing in TSW5 and for a lot of DLCs, it wants to download the TSW3, TSW4 and TSW5 version of it.
Same here, I deleted everything. TSW4 and TSW5 from my PS5. I moved all my other games to my SSD so I now have the original space reserved for TSW5 and when I started downloading from my library I checked every owned DLC that showed up there. Downloading that now. Takes some time, then i can check how much that is and what i'm stil missing. I guess I got enough new things to play with so i can wait for DTG to get this right.
When you download any DLC on your PS5 it also want's to download the PS4 version. You can simply stop that download. So only let it download the PS5 version. I did this for al the routes i own and now again have to wait. It seems to be working just fine. You just need to have some patience,....