I would expect you to be able to build dreamlte for Android 10, but I believe that LineageOS seemed to stop official support for Samsungs of this generation – so we hit a problem. You will know that /e/ is a fork of LineageOS so this is quite significant.
Unofficially check out [ROM][UNOFFICIAL][dreamlte/dream2lte][[SM-G950F/SM-G955F][10] LineageOS 17.1 | XDA Forums.
Right now /e/ + dreamlte is “waiting” see Week 34, 2022 : Development and Testing Updates.