Hello Mehtaz Afsana Borsha,
I'm afraid this is not a usefull answer at all.
The message in first link says: "I remember that was at least two but for Joomla 3, maybe there for J4 too. Please make research on JED (Joomla Extension Directory) :0)".
In other words: go and see if you can find a menu pop-up extension for Joomla 4 yourself.
I my message I already told you there indeed is one (see the link in the message) and that Helix/SP PB messes it up. How about try to solve that problem?
The message in the second link is about inserting a pop-up in a page, not from the menu, so this is not relevant at all.
Could someone please really look for a solution in stead of looking for the word pop-up in earlier messages? Thank you!