A lot of the above suggestions reference British shows. You might consider a BritBox subscription-- a lot of the BBC stuff is on there. You can add BritBox via Amazon Prime Video.
https://www.amazon.com/gp/video/storefront/ref=atv_3p_bri_c_r0a4Mf_FEWvYK_1_1?benefitId=britbox&MLP=MLP&tag=decider08-20&benefitID=britbox&node=2858778011
The
Father Brown series moved from Netflix to there. He's a mild-mannered Catholic priest who solves local crimes. Same for
The Vicar of Dibley, which is a gentle British sort-of sitcom set in an Oxfordshire village.
Derry Girls is still on Netflix for now, and she might enjoy that.
Call the Midwife is also still there.
The entire series
The Waltons is also available through Amazon on Prime Video.