how to get apple business for apps development

Hello,

This sounds like it could be a combination of Apple Business Manager and Apple Developer but I could be wrong. I think your best route would be talking to Apple's small business agents if your business fits that description.

Small and Medium-Size Businesses - Apple

"Our Business Team.On your team.

We’re available to guide you to the right hardware and devices, help you compare apps, and work with you to find financing options that fit your budget, at no extra cost. We’ll even make sure you can hit the ground working with the systems you already use, like G Suite, QuickBooks, and Microsoft 365 — all compatible with Apple products.

Call us"

https://developer.apple.com/programs/

I hope this helps.