The team have been working on this for some time (one difficulty is that LineageOS dropped support for the device). An /e/OS version has been in testing since autumn 2022. One could join the testing team by reading carefully and following this link Testing @Murena but testing is not suitable a device on which you rely in daily use. In this closed post a user talks about his journey on this path. V1.5 for samsung S8 dreamlte arrived?!
I understand that once an updated /e/OS is published the Legacy status will be dropped.