Seed has USB host peripheral on its pin, just no actual hardware that uses it. It also doesn’t provide 5V for USB, so external chips are required. And then there’s no software support for the kind of endpoint that Grids needs.
Bela might work as it runs Linux and drivers for serial USB, but best to check their forums. In case of OWL there is no support for serial USB in firmware just like with libDaisy. USB host is only usable only for MIDI or HID at the moment. Then you’d need to modify firmware to expose this data to patches.
Except that both run Heavy rather than puredata and you get less working objects this way. Theoretically you can run patches via libPd on Bela, but they perform much worse.