This part was designed to hang an umbrella outside a wooden gallery ramp. You need 2 supports.

I've tested it with PLA+ and everything is good even though it is on full sun and printed in black PLA+ (2 years without problem on south orientation at full sun). My suggestion would be lighter color Here are my printing parameter: PLA+ eSun 0.6mm nozzle 4 walls 15% Gyroid infill 6 top and bottom layers