We have been asking for this for a long long time, I actually think even the manufacturing date is BS.
Go check the landed orders you'll see that someone who ordered like 4 or 5 different products all have the same manufacturing date. Too me it looks more like packing date.
Personally I don't think the COAs are of any use. You are trying to compare for example H36 black top, but there is no way of knowing if the black top you got was from the same batch as the black top tested.
The only value is we can see for the peptides both vendor and customer tests 99% of the time the purity is >99%, which means is probably ok to just pin and hope for the best.
I honestly think all these Chinese vendors are just drop shippers so they don't get much say in any of this stuff. That's the only explanation for not implementing something that seems so simple to implement.