What Apple Watch would you recommend for my mom?

Hello everyone,

I'm thinking about getting an Apple Watch for my 75 y/o mother as a birthday gift this year. Purely for its health features. She used to use FitBit Inspire HR and its best part was it was slim, so it didn't bother her. Apple Watch's size is a downside.

Anyway, a friend of mine has Apple Watch Series 11 and she said it does not notify when her blood pressure goes up and that "Hypertension Alert" feature is not reliable. Is that true? Because if it is, then it's kind of pointless to get that?

My mom does not use anything other than normal time and health purposes. Connection to phone etc is not needed.

Thank you for reading.