The Harbor Freight telescoping flagpole is popular for mounting Starlink Minis to campers, rvs, and overland vehicles. I needed to mount mine to the t-track rack on an Opus camper, so it's an esoteric item. This bracket attaches to the pole with 2 hose clamps, and has M8-sized holes for rack T-track. You could also use this to bolt the pole to some other surface. Print in something strong and UV resistant like ASA. I use 3 to hold up my pole.
https://www.harborfreight.com/20-ft-telescoping-flag-pole-kit-64344.html
The author marked this model as their own original creation.