How many Apple Pay Payment Processing Certificates can be Created for One Merchant Identifier?

How many Apple Pay Payment Processing Certificates can be Created for One Merchant Identifier?

I created a merchant identifier and would like to use it for all the service providers I need to integrate against (e.g. Stripe, Square). However, I don't want to run into a situation where I can only create a few payment processing certificates.

Thanks

How many Apple Pay Payment Processing Certificates can be Created for One Merchant Identifier?
 
 
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