Real Madrid still don't have a striker. They haven't been able to sign a good striker since Benzema left the team. Vinicius, Rodrygo and Bellingham prevented them from having goal problems. But they need a good striker. And even if they sign Mbappe, they need a good striker. I think Joselu can continue to be a good alternative for them if they can't sign a good striker. Also, it must be said that they didn't sign a good striker after Benzema, but they won both the Spanish La Liga and the Champions League. And next season they will be the favorites for both trophies.
Real Madrid is currently still considering making Joselu permanent even though Joselu says he doesn't know where he will be next season.
The arrival of Kylan Mbappe who is almost 100% will make Real Madrid's front line inhabited by fast players who operate as wing attackers but almost no players in the main position as center forwards. So, in my opinion, the option of making Joselu permanent is very important to do, at least it can be an equalizer when there is a deadlock.
It is true that after Benzema's departure, there is no other center forward but Vinicius, Rodrygo, Bellingham can still help in scoring goals. If Real Madrid brings in Mbappe again, then the competition will be even more positive. But letting this condition continue will not be good.