I have created an issue here, Upgrade to React 18 support with hydrateRoot · Issue #125 · netlify-templates/kpop-stack · GitHub.
I need help with upgrading Remix kpop-stack to React 18. I tried to upgrade the packages but still getting errors in console. More information in the issue link above.
, welcome back to the forums! Thank you for letting us know you create an issue for this in Github. Our team is looking into this and will get back to you as soon as possible. Stay tuned for an update. (: