Looked at TD for my R3GT. They didn't have it in their system and didn't seem interested in doing the work to "send it to the underwriters" for a quote.
I have used Rider's Plus, TD, Primmum, Echelon, Mantha, Kingsway and for past few years with Cooperators. There was a transition within Cooperators, the company I was with (Coseco via HB Group) was consolidated and I wasn't sure if they were going to continue to offer MC insurance. In the end, they were by FAR the least expensive. It should be noted that I, like many on here, have my home, auto, motorcycle insurance with one company.
It still may not be true, but they were very cautious about taking on motorcyclist who didn't have significant riding experience (aka good insurance history). They also insure my wife's 2019 HD FLHC.
As a note, I would suggest you keep a record of your motorcycle insurance companies. It really helps to show them your history of coverage.
Good luck...