Yeah a 65cm is pretty mild in the recoil department. Rifle weight makes a big difference here. Most guys a building 65cm in lightweight rifles. I had a Ti3, 20in proof carbon, hnt26 setup, suppressed. 156s at 2750 with hot load of rl26, it was pretty punchy, but it was like 8.2# all up.
My woman started hunting with a 65cm, but then she wanted to start hunting elk, so I converted her Tikka to a 65prc, she killed and shot it well, but it wasn't pleasent for her at the range. Now that Tikka is a 6cm with a supressor and she loves it.
For a female, confirm her dominant eye matches her dominant hand. Lots of RH women are actually left eye dominate. I've introduced 5 women to shooting rifles at distance, one was lefty, 4 righties, but 3 of the 5 were left eye dominant.
I'd def look for a 6cm. Mild enough recoil with no muzzle device, but excellent down range performance!