From the looks of it, SeaPrint doesn’t really help or have that in scope - there is no standard on Bluetooth it seems. SeaPrint is about standard protocols and formats. IPP and Raster handling is something where i can give the others a run for their money, but things like PCL and ESC with their versions and dialects is not a mess i want to enter into (no chance of seemless autodetect).
Even CUPS is throwing out all the legacy cruft into separate services nowadays. So that’s going o be my advice; add it to CUPS, or perhaps better yet, PAPPL/LPrint and use SeaPrint as a GUI/client to that if it is helpful.