Hi Nepenthesman,
Stripe’s policy is to evaluate each merchant application on a case-by-case basis. They consider factors such as the merchant’s business model, financial history, and industry regulations. If Stripe determines that the merchant poses too high of a risk, they will reject the application.
Maybe you can find some more information here on this website and this company can help you perhaps further to find a 3rd party payment provider for your shopify store.
https://payprocc.com/stripe-reject-merchants-in-high-risk-industries/