There's no Ni-MH that does 1.2v

There are Li-Ion rechargeable batteries that do 1.5v, just that I am not sure about the brand.

https://www.amazon.com/TENAVOLTS-Rechargeable-Battery-Charger-Batteries/dp/B082F5YVH2/ref=sr_1_2_sspa?crid=1HHSOFMFKHHXM&keywords=rechargeable%2BLithium%2BAA&qid=1664078725&sprefix=rechargeable%2Blithium%2Baa%2Caps%2C88&sr=8-2-spons&smid=A1Y5IJ6TB0ARCV&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExQUUzSVQ0T01RM05LJmVuY3J5cHRlZElkPUEwMTMwMzQzMTVISUhIOUw1RVNaWSZlbmNyeXB0ZWRBZElkPUEwMzM0OTYyMzlZRDk2QVlMREFSNyZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU&th=1