Bayern Munich and Real Madrid are both lacking an important thing in their squad now which is a striker. They both have strikers in their squads technically of course but they don't have a reliable one for especially the Champions League. Bayern Munich's performance was quite inadequate for this reason last season as well.
Both teams you mention need other potential players. But Bayern Munich does not need a striker now, or let me say, it is not necessary for Bayern Munich to get any players in my opinion. because they have all the positions and they are still strong, so they don't need anything like that now. What I think is the weak point of Bayern Munich is their coach, and if they get a new one, I believe they will see the best in them. However, Kareem Banzema move to another team, not because of anything but because of his age, and he may not be much stronger for the coming seasons.
Looking at Real Madrid's last match, two of their new players showed positive things, Joselu and Jude Bellingham. For Jude, there were many people who believed in him from the start, but for Joselu, many people doubted his ability. But that doesn't mean he can justify it, he has to show that what people say about him is wrong, and he can do his best up front for Real Madrid.
Personally, I still doubt Joselu will be the answer to Real Madrid's needs next season. I also won't rule out the possibility that my doubts are also wrong. It depends on how motivated he is.
Hopefully he can show his best.