I just Scrolled through the bug report forum and there are lots of reports for this , as well as the workbench number glitch , hopefully these got fixed soon
Also having this problem on the Switch. Have gotten the message multiple times that it’s expanded, but still can only see the first 4 things. Multiplayer game if that makes a difference.
Hopefully this issue is getting the traction it needs to see a quick fix! I just unlocked the greenhouse and it's a shame to know that the whole new neighbors questline is bugged :^/