My step mother and mil have both had hysterectomies in the past year. They were both 62. They had keyhole surgery (whatever that means). Step mother recovered very quickly, mil had complications, but that is entirely predictable given their respective personalities.
One aspect, aside from the physical, that your mum may feel is the sudden loss of her "femininity" and the absolute closing of the door on her fertile childbearing years. This can be very hard to come to terms with, no matter what the woman's age, even if she is way past menopause.
It seems similar but different to a c-section iykwim. Some things were the same, like having to wait 6 weeks to drive, but it took a long time to feel better, she had really awful indigestion and wind for a couple of weeks, her tummy needed to settle down after being moved during the op. She was totally washed out for about 3 weeks, also a bit depressed, which apparently was a side effect of the general anesthtic.
She was still taking painkillers a year on. She says now, about 18 months later that if she doesn't exercise for a couple of weeks her tummy becomes painful. She had a hard time pursuading her doctor to prescribe hrt (she was 55), but it definitly made her feel better.
It was definitly the right thing for her, she had an awful time before with early menopause for years and then a 'sinister' ovarian growth.