Yes and no.
“Add to Home Screen” living on the share menu is as insane as “Find on Page” living there. Which both do. And I don’t think there’s a master plan behind “find on page” being tucked away bafflingly on the share button.
It’s just bad UX. No conspiracy here.
It's not a conspiracy that they once promoted PWAs as being the future and then reversed course so far as to removing the ability completely.