I had a 2015 Burgman 400 with a heated seat, and miss it!
Is there a heated seat available for the slimmer 2020 model?
I can’t find anything on the UK websites, so am at a loss.
Help please.

There are a few extra heat pads available for bikes and ATVs try eBay

I bought a generic Carbon Fibre bike seat heater pad kit with loom and relay for about £40 from ebay for my Yamaha Tmax. I extended the kit wiring loom so it could be fed through at the hinged end of the bench seat.
The switch is a two-stage item so it has a low and high setting.
I drilled a small hole in the dash trim and fitted the switch then picked up the fused and ignition switched live feed from a 'Fuzeblock' fuse panel that I fitted for accessories.

I have to say, the seat heater kit is absolutely fantastic and is money well spent.