High-Yield Savings Accounts are something distinct from normal savings accounts. I don't believe there are any HYSAs being offered that have rates as low as 1%.
You can find many institutions online offering HYSAs. It is definitely pretty common. In personal finance circles it's very often recommended to put your emergency fund in a HYSA.
And yes, as you noted, HYSAs have different rules than normal savings accounts. Just like how CDs do.
Threads is antithetical to everything the fediverse stands for, so you can still use the term because it doesn't get to claim the term.