Wooden floorboards with underfloor heating?

We do not want underfloor heating, just a warming. The radiators stay in the room.

Then save your money, a wooden floor also has a pleasant temperature feel even without heating underneath.

If it is only meant to be additional, I would refrain from it and rather put every cm into insulation, especially if there isn’t much yet. Wood is also pleasantly warm on its own. By the way, glued parquet works, floorboards 2cm+ significantly worse. It always depends on the overall construction. There are already topics about this. Just search for them.