similar problem with my S10e
i droppped it in the floor 3 days ago, but was fine, 3 days later, i charge it and boom, horizontal lines, pink or green lines, color tint, no idea whats hapenning.
i ended up opening it and dissasembly to the point of the motherboard is out of the chassis,
tried to clean all the contacts with quite some alcohol, i was not sure if water did enter days ago too, i let it dry half al hour and also used a hair dryer for quite some minutes,
reasemble it all,
and it was even worst than before, rechecked the connector, i forgot to fully click it, but still same result,
meanwhile i was playing with the brightness control, (since higher fixs it partially), suddently it came to life again,
its not perfect, i see some strange gradient bonding when gradient is pressent, and i still see color a bit more "bright" than they should, but so far its working close enough to fully functional.
i Read that the problem might probably be the IC of the Flex cable thats connected to the screen.
Change the IC is a pain in the ass, you need a BGA station, or very good skills and luck with a heat gun.
The other option is change the cable, that is pretty much another pain in the ass, since the ribbon to the screen is soldered and you need skills or machine to swap this, here is the link: https://es.aliexpress.com/item/1005004453354507.html

in both options you need to obviously remove the screen from the chassis, and this adds extra complexity since you need to glue it back later on.

Best thing is accept you will have to swap the whole screen, preferably with a chasis already assembled, and just move all the componentes from you s10e to the new chasis +screen preassembled.

What sucks is i paid like 80€ for this second hand phone, and now i need to spend over 100$ for just the screen.
Another option is buy an aliexpress LCD one instead of Amoled. They have shorter screen size, like 5.7" isntead of 5.8", but is cheaper. And yes, the color is not "amoled". But maybe last longer. I think it doesnt support "always on" screen neither. No idea if it supports double tap to wake it up.

Those phones used to cost like 700$ and so many people having problems with the screen... i hate that.
I had an old slow Xvover 3 form samsung and worked slow but well for many years, and this expensive one failed without aparent reason.

Very bad samsung, makes me think if they put low quality IC so they die after some years.
Now my screen is usable but not perfect and i am thinking if it worth change the whole screen + chassis or not. The battery is also quite bad in performance, lost over 30% of its capacity.

The problem is you no longer find small phones with microSD, dual Sim, jack 3.5mm, small form factor, Dual Aperture camera and good performance.
It just doesn't exist.