I’d go A34. But I’d keep an eye on updates and security patches for her. 2-3 years and she’ll need another phone if she does any online shopping, banking or anything else that requires sensitive information. With the A series it’ll be important for her to reboot the phone weekly as well, even the S series gets a little wonky after a week.
It’s also 2023 and your battery still needs to settle in for a week, and a few years ago the fan boys said “nah-ugh” It’s still a smart phone, it will still have bugs and glitches, all of which can be remedied by a reboot. Like I said even my S22 and S23 have hiccups. “I’m buying a phone for so and so.” Just warns me that, that someone may not grasp the concept of a smart phone beyond the one UI6 skin they see on the dialer and browser is all.
It’s not to say the A is shit, it has it uses and functions, I just note the less obvious than the exynos chip and camera aren’t amazing, the software doesn’t get updated as often that’s all.