Can you tell us which provider you use?
In the past it was people who where using Vodafone and Orange networks who didn’t get updates.
For the life of me I can’t find the topics anymore that had a workaround. It usually could be fixed by temporarily using a different SIM card. Once people got past a certain version, normal updates would resume.
Not exactly sure if the same applies to you because the cases I remember were stuck on even older versions.