I am in the UK and see them all, with Mare in with the CDs, but Mare (Club Mixes) and Graal (Prologue) appear with Singles and EPs. This is because these last two are tagged as single and EP respectively.
Do the missing albums appear in your Singles and EPs list?
In general, Roon will always try and get what it thinks is the best overall metadata, and usually that entails adding to or, occasionally, modifying Tidal metadata.
In this case, as far as I can see, there is no other metadata; Allmusic shows nothing, so the data is from Tidal - apart from the EP/single flag. I don’t know where that has come from.
You can tell Roon to prefer metadata from a file if you have that, but I don’t think you can tell Roon to ignore the Tidal input apart from making the album unidentified. Adding metadata would then be up to you via manual Roon editing.