I don't see any problem in this, Bellingham scores and it's great for Real Madrid, I doubt that they are now looking for someone else to sub-position the striker. If Mbappe becomes a free agent next season, then Real Madrid will certainly not refuse to take him to the team, but everything is always not easy with Mbappe, and he can still change his mind, extend the contract with PSG, or whatever happens, Real will not wait until next summer to find out, but if Mbappe comes as a free agent they will certainly take him to the team.
Yeah it's true it should be better if Madrid have these two players obviously their strength and attack would increase, there is really no point in speculating about Mbappe we all know that Madrid is Mbappe's next target as rumors say Mbappe and Madrid have reached a personal agreement and now they are waiting for the right time to arrange a move for Mbappe. I suspect that the transfer fee that should have been paid to PSG will be transferred to Mbappe through his weekly salary so I wouldn't be surprised if Mbappe became the highest paid player in the world after moving to Madrid. By the way, Mbappe contract status is gone on transfermarkt.com, why?