I think Chelsea should sign a better goalkeeper rather than signing a striker now. I don't like Robert Sanchez now. He isn't a player who is at Chelsea's level at the moment. Kepa is also not coming back at least until the end of the season and I doubt his future at Chelsea later as well.
There have been rumors circulating that Chelsea are monitoring Arsenal goalkeeper Aaron Ramsdale, but it seems that this is just a rumor, although often a player's move starts with a previous rumor, finally confirmation is obtained by seeing the player sign a contract with the rumored club. Robert Sánchez at Chelsea was indeed a mistake and maybe next season or in the nearest transfer window Chelsea will try to correct this mistake by buying a more reliable goalkeeper with minimal blunders.
Now Joao Felix has expressed his interest in staying longer in his dream team and is now just waiting for Barcelona to decide whether they are able to make the transfer permanent or not. It would be another misfortune for Joao Felix if he doesn't get a permanent deal and has to return to Atletico.
Usually clubs are very enthusiastic about making a player's status permanent, but this time the opposite happened, the problem is how much money does Barcelona have to spend to make Joao Felix permanent at Barcelona? only value that matches Barcelona's abilities will make this happen, and the one who suffers the most is Joao Felix whose fate will again become uncertain if he has to return to Atletico Madrid, unless he can show extraordinary things at Barcelona so that there are elite clubs who are interested in buying him from Atletico if Barcelona can't afford him.