Toilet dump line to waste tank is a more than likely straight short drop. They can be glued fittings OR installed using grommet type seal.
Relocating it would require removal of 'pedestal/base' replumbing dump line with a couple of 45* elbows, rebuilding pedestal, attaching floor flange.
This is IF there is enough room to accommodate the reworked plumbing.
An other option IF there is room on top of waste tank:
Redoing dump line to an new cut-out opening in top of tank so dump lie is straight and then sealing up old dump line entry with a disc screwed/caulked on to top of tank.
OR do a complete rebuild on current toilet........replace with a direct replacement toilet.
Options limited.