I am glad that Coco was able to recover from her episode! That is scary!
Yes, many bulldogs have severe breathing issues if they have a particularly elongated soft palate. It sounds like that is a likely possibility for Coco. We would sometimes have issues with Frank and one day he was running around too much and got overheated, aspirated on water and was struggling to breathe as his tongue and gums turned blue. We rushed him to the emergency vet and he was intubated. After a couple of days, he had surgery to shorten his soft palate and widen his nostrils. He pulled through luckily but it was touch-and-go for a week. Now he is fully recovered and breathes so much better. We haven't had any issues since. We exercise him moderately.
If you have a bulldog vet that you trust, I would suggest that you have Coco's respiratory tract evaluated.