Hi
@moona12 and warm welcome to the community
👋There's no problem for your phone, if you're device was eligible for beta it's opposite, it's been invited to test new software, but being said that be careful as beta only for people who will risk some banking apps not working, Google pay or samsung pay not working, and much more.
It's beta testing so you can report any bugs and more to developers, if you install beta and most recommended to people who have secondary phone without beta or you willing to go through all bugs if any appears and report it, as that how beta works, some people join beta just because of "i want latest software on my phone" and it takes space for someone who would actually test it and report bugs or anything else wrong.
In short no your phone is perslfectly fine, and you're device was one of them eligible ones who can participate in beta, if you ask me I would wait for stable release which should start rolling out from 7th of April.
I'll leave some links to see what beta means.
https://news.samsung.com/global/samsung-one-ui-7-beta-rolls-out-to-more-galaxy-deviceshttps://developer.samsung.com/one-ui-beta