Welcome to the forum!
I am assuming the round over bit is the type with a bearing to run along the edge of the wood?
You should be able to clamp the piece along the edge of the MFT with a little overhanging / protruding beyond the edge of the table. Maybe not with Festool clamps depending on the distance to hole locations , but with some type of bar clamp or quick clamp.
Put one clamp near the middle of the piece and a second at the opposite end from the end you are routing from. Route half way until you reach the middle clamp, ease the router out and turn off. Move the far clamp to the beginning of the cut where you have already routed, and shift the middle clamp enough to allow room to ease the router into the middle and continue.
Be sure the clamps are tight AND clamped fully over the table surface, NOT partly over the metal table side in such a way that the piece could tip down while routing.
You should be able to use the dust cup as well.