MacBook Air - M1 Chip/2020

Im trying to set up two external monitors - two HP/24mn monitors - the display rotates between the two monitors (when the computer goes to sleep) - using one Apple adapter and one Belkin USB-C adapter - I've checked the cables/restarted/unplugged etc. - again, the display appears on one monitor but not both - when the computer goes to sleep the display jumps monitors - how can I get the display to show on both?