Are there alternatives or workarounds for using Stripe in countries where it's not available?
Yeah, there are definitely alternatives. You can't use Stripe in a country where it isn't offered. Take Bangladesh—without a verified business, getting Stripe to work is pretty low, but you can use Payoneer, PayPal, or other platforms like W (a competitor to School). Stripe is just a payment processor; it's great and I use it all the time, but it's only one piece of a functional business. Not having Stripe access doesn't prevent you from running a business.