Where do you live? I’m pretty sure in Australia your registration is checked automatically whenever you drive past a police car, which are all equipped with cameras.
I have seen numerous cars driving around with months long expired tabs. Right now it isn't being heavily enforced, and these tickets are quite hefty, often several hundred dollars, and are not considered a moving violation. (Seattle, WA, USA)
Not sure about WA, but over here in OH we have a covid extension - if your registration expires between March 2020 and April 2021 you have until July 2021 to renew. So I've been driving a vehicle with an expired temp tag from November.