Bro Better see any available options in Samsung. Since you are telling it for your parents and they have already used Samsung mobile. It will be difficult for them to switch to other UI. Experienced this with my parents.
My parents haven't always been exclusively using Samsung. Before the current Galaxy S23 (USA Model), my mom used Google Pixel 4a (Indian Model, 4G LTE only, no 5G). Before the current Galaxy S22 (Indian Model), my dad used OnePlus Nord CE 5G (Indian Model, supported 5G on N78 only) and Motorola Moto X4 (4G LTE only, no 5G) before that. My mom also used iPhone 12 for a brief duration but switched back to Android since she found it difficult to adjust to iPhone.
I would have gotten them a recent Google Pixel instead of Samsung Galaxy series but decided against it as Google started using crappy Samsung Exynos modems from Pixel 6 onwards (when they switched over to in-house Tensor CPUs). I have myself used Pixel 6 and 7 and had faced worse cellular reception (in USA) than even "Pixel 4a 5G" before that.
I mainly want:
Android with good amount of promised OS and Security updates (like at least 5 years from launch date).
Qualcomm Snapdragon 5G modem
Dual Physical SIM + eSIM support (Both Physical SIM slots and eSIM must support 5G).
8 GB RAM or more (future proofing)
256 GB Storage or more (UFS, not eMMC)
While OnePlus 13 looks like a better value for money compared to Galaxy S25, OnePlus only promises 4 OS updates compared to 7 OS updates for Galaxy S25 promised by Samsung.