Did leather and sodium hypochlorite create hexavalent chromium? How much?

I unfortunately didn’t know any better and have cleaned my real leather couch with Clorox Bleach Spray (1.84% sodium hypochlorite) on three separate occasions. It stayed there for a while before I wiped it. Two times I think I may have let it sit there for 20min and another time maybe 3-5min maximum. After all three times, I dry wiped the couch, although not thoroughly, and it always felt slightly sticky afterwards. Dye came off on the cloth. My concern is regarding the chromium tanning of leather, specifically whether or not the chromium oxide oxidized into hexavalent chromium as a result of my spraying of the sodium hypochlorite.

There is a lot of literature and information from many international/national agencies, organizations, etc about the concerns of hexavalent chromium being produced from leather, either during the tanning process or afterwards due to strong oxidizers.

I sprayed a total of around 25ml 3 times (total 75ml) of 1.87% sodium hypochlorite on the leather. Leather is roughly 5% chromium, 70% collagen, 5% oils, 10% water, and 10% dyes, additives, etc. Given that the bleach is the limiting reactant, roughly how many mg of hexavalent chromium would have been produced?

Based on the reaction rates of bleach and organic matter like collagen and its oxidation of trivalent chromium, which one occurs more favourably? Would only a very small percent oxidize the chromium? Is this true? If not, I am concerned a significant amount of hexavalent chromium may have been produced, over 1 gram.

https://www.sciencedirect.com/science/article/abs/pii/S0020169306002118

https://link.springer.com/article/10.2116/analsci.27.649

I found some studies that may be of help regarding the rates. I myself am having trouble with them.

Does sodium hypochlorite react much faster with collagen or proteins or organic matter in general? Would this mean only a very small proportion would have reacted with chromium?

Since the dye on the cloth came off it seems like whatever surface coating that may have been used on the leather didn’t really prevent much.

Thanks

Edit: It doesn’t seem to be exclusive to the tanning process. There have been studies done on simply applying oxidizers on leather. For example here is one: https://www.naun.org/main/NAUN/ijmmas/2001-155.pdf

In the last section (Experimental) it states specifically that strong oxidizers should be avoided due to it producing hexavalent chromium if applied to leather shoes. Here is an image: https://imgur.com/a/j8EdvMr