Soft Loop Tie Down Straps - 1,500 Load Capacity & 4,500 Lbs Breaking Strength - 6 Pack - Loops for Securing ATV, UTV, Motorcycles, Scooters, Dirt Bikes, Lawn & Garden Equipment - by AUGO

Amsteel loops I use these as an alternative: https://www.amazon.com/Soft-Loop-Tie-Down-Straps/dp/B01N1NV536?th=1

You could try ‘soft loop tie down straps’ like these here: https://a.co/d/0oKNWyj I have found them very useful in various lifting scenarios or just in general usage (carrying things, hanging things, etc.). They’re cheap and can hold a lot of weight. One on each end of a dumbbell handle and then clipped together at the other end to your belt might work and hold the DB sort of level.