I am not sure what you asking here, but if you lose your private key of eth address or any other key required for access on your wallet, yes, there is no other possibility to claim your UNI tokens. You can forget about them, no matter what is the price. If it's for your consolation, no one can access to these tokens without the proper key.
better try to remember how you approached the platform, as I know there is a couple of ways, just try to remember if you use Metamask, then you need just a password I think.
If you trying to find someone experienced who's also lost his key, to cry together, then is something different.