Adding the qualifier of "since 2022" seems to presume there's an unspoken taboo between western liberal media that Putin shan't be interviewed, rather than Putin being more restrictive than he already was and seeing an opportunity in Tucker. Lionel Barber is probably the closest a "real" US journalist could have been to Putin and writes about the increasing difficulty of this in 2020. This includes psychological tricks like being made to wait excessively long to weaken his cognition before the meeting. He has a good piece on Tucker's interview about how Putin ran the show and used him.
The reason why Putin chose this interview is because Tucker is a locus of division in US politics. Tucker isn't raising Putin's platform, Putin is raising Tucker's platform. This imbues Tucker's reactionary politics with more legitimacy, which benefits Putin.