Yes! if your RP expired and want to leave the country, you still need exit permit from your sponsor, unless you are deported.
And RP, "CANNOT" be converted into Visit Visa, but.... Visit Visa can be converted into RP.
If your RP is cancelled, you must leave/exit the country within a week.
If you want to return back to Qatar within 2 yrs., either on Visit Visa or Work Visa, you need NOC from your previous sponsor.
Yes! if your RP expired and want to leave the country, you still need exit permit from your sponsor, unless you are deported.
And RP, "CANNOT" be converted into Visit Visa, but.... Visit Visa can be converted into RP.
If your RP is cancelled, you must leave/exit the country within a week.
If you want to return back to Qatar within 2 yrs., either on Visit Visa or Work Visa, you need NOC from your previous sponsor.