How do I grant access to a freelancer to do some work on my shopify page?
Please review this blog, it has step by step instructions:
https://help.shopify.com/en/manual/your-account/staff-accounts/collaborator-accounts#how-do-i-give-them-access
How to request access:
https://help.shopify.com/en/partners/dashboard/managing-stores/request-access#request-access