To all you sewing lot...

...if you can

1. open at convenient point (convenient to close up)
   
2. apply a heat-press patch on the inside, prob using the iron from outside, some kind of support on inside (wood offcut)
   
3. and then use press studs (Prym + hammer) to re-attach? Possible one in centre, two at corners of strap, inner reinforcement will distribute the load stress. Plus(!) some on other side for when the same happens
   
4. Without burning any of the stitch thread, use a lighter to melt off/fuse loose ends, scuzzy patches to prevent them fraying in future
   
5. Stitch up a your most convenient place of opening
   
   

Just my thoughts but I’d go for this ‘lo-fi enhancement’ rather than trying to make ‘like new‘, and add strength/durability for future.