The name is biased, but the #Raspiblitz scripts run on anything Debian compatible on aarch64 and amd64 including Thinkpads:

https://github.com/raspiblitz/raspiblitz/tree/dev/alternative.platforms

you can find prebuilt images too.

If would prefer more manual work see: https://v2.minibolt.info/ (built from the Raspibolt guide)