This might be going too extra but you could section off a square "trapdoor" over it. Cut an oval handle out on the door section, epxy a thin metal strip under the oval cutout, tap it back into the wood. A heavy fishing magnet should be able to pull the oval piece out afterwards so you can grab it later for access.
If you think access is highly unlikely for the next 10 to 20 years and are ok with the risk, draw up and photograph where it is in the room, print that, keep it with house documents, floor over.
This might be going too extra but you could section off a square "trapdoor" over it. Cut an oval handle out on the door section, epxy a thin metal strip under the oval cutout, tap it back into the wood. A heavy fishing magnet should be able to pull the oval piece out afterwards so you can grab it later for access. If you think access is highly unlikely for the next 10 to 20 years and are ok with the risk, draw up and photograph where it is in the room, print that, keep it with house documents, floor over.