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Yep. But a pretty large majority of websites do already and the number is increasing every year.
HTTP/2 basically requires TLS (as AFAIK no major browser did implement plain HTTP/2 due to it being backwards incompatible) and HTTP/3 has TLS baked into the protocol itself.
We might not be there yet, but at some point in the future the chance that there is only HTTP but not HTTPS might be pretty small vs. the risk of using an insecure sonnection.