Was there really no way to keep Olise?

Sorry I don't know all the in and outs of player transfers with premier League but after this whole first half I just wonder if we could have given Olise a bigger contract or is it more the player rather sign with a higher tier club?

If we sold Guehi could we have kept Olise?

Could we have the same thing happen Munoz, Wharton, Eze, Mateta?