How to provide users from another Entra ID tenant access to a SPO site

Hello curious7 

To restrict access to SharePoint Online to authenticated users only (which is recommended), you should invite external users as guest accounts in your tenant. Additionally, ensure that the https://learn.microsoft.com/en-us/sharepoint/sharepoint-azureb2b-integration is enabled if it hasn't been done yet. This ensures that external users are subject to Microsoft Entra ID access policies, such as multi-factor authentication. If you need to invite multiple users to your tenant, the partner tenant can configure cross-tenant access settings to automatically redeem invitations from your tenant. This way, external users won't have to accept the consent prompt > https://learn.microsoft.com/en-us/entra/external-id/cross-tenant-access-settings-b2b-collaboration#modify-outbound-access-settings

Does that solution work for you?