You don't need a mac for any part of the development process if you're using Expo and EAS.

You can sign up for the apple developer account through any web browser.

Development can be done on your Windows PC, with testing on your iPhone through the Expo Go App.

When it's time to build, just use EAS cloud build and it'll compile your app and publish through your Apple developer account without ever actually needing a mac

Bear in mind the free EAS plan limits you to 15 IOS builds per month. If you plan on publishing more often than that you'll have to upgrade to the paid tier