megalol this game below with UAGC gives a warning that there are no .rpa's to extract and with the message "game is probably protected by the developer".
The second game skips them all together with no warning and moves straight to building the game with the SDK automatically.
When I use UnRen-forall beforehand they extract fine and afterwards the game compresses fine. Builds back fine manually with the nightly SDK afterwards since it's a v8.3.3 xxxxxx nightly back to .rpa.
Maybe these 2 are one-offs? I've actually never come across this, at least on the Ren'Py side.
Brothel Tycoon [v1.00.137] [DMA Games]
Sophia's Spa [v1.03.598] [DMA Games]