Dear OP
SQLModel looks unmaintained. The PRs are languishing in purgatory waiting for the submitters to croak from old age. I died a little inside (see imdb all reviews must start with a drama queen comment like this) noticing the PR count has just achieved 70 PRs as of today. Which must be an achievement in project mismanagement.
According only from the release notes, the last real release was sqlmodel-0.0.23 on Feb 28th 2025. For those keeping score today is Aug 8th 2025
Most activity is bots upgrading gh actions and precommit autoupdate. aka commit spam.
The last human commit was Jun 19th fixing some tests for the docs.
This is a sell point for litestar. Bypassing pydantic also bypasses the horror show of SQLModel.
Will look into msgspec+litestar