I have a /64 from my ISP and I want to run a few VLANs on my home network but I can't subdivide the /64 any further using my business class (TP-Link omada) rout

I have a /64 from my ISP and I want to run a few VLANs on my home network but I can't subdivide the /64 any further using my business class (TP-Link omada) router's controller. Maybe there are similar limitations in place here?