Joselu did not come with a purchase but he is only on a season-long loan from Espanyol so in this case it is possible for Ancelotti to still look for a player who fits Madrid's style for the position of pure striker at this time.
Indeed, the presence of Joselu and the other players in the attack for now is still very good but still next season Joselu will already leave and this is quite the right time to find a suitable player according to the criteria of Madrid and Ancelotti.
There is still time for now especially with the current situation for Madrid they can still delay even though the winter transfer is in sight but they can still hold back if they still don't find a suitable candidate for a pure striker but this should not be allowed to drag on because after all their deadline for finding candidates is until the end of this season.
Just like i said before Real Madrid priority for winter transfer is they want to gets at least 1 defender player and seems this is urgent because we all know Real Madrid was losing some of important players on that position and recently the players such as Robert Renan from Zenit St Petersburg, Sporting player Goncalo Inacio, and Manchester United player Raphael Varane was into their radar and few more hours winter transfer window will be opened so lets see which players will Real Madrid buy but i am sure Real Madrid will gets new defender player soon
Currently Real Madrid have no problem with their attacking lines because the players just like Rodrygo, Vinicius, Joselu or even Bellingham still able to performing well and scores goals for each matches so i am not sure Real Madrid will give their priority to gets new attackers this january and after end of this season Joselu loan duration will be expired and he will return to his team Espanyol so in my opinion Real Madrid will only buy new attackers next summer but not this january because buy new defender is more important than gets new attackers