User fields created in the main site aren't replicated to the subsites

[MaximilianoRicoTabo]

Describe the bug
User fields created in the main site aren't replicated to subsites

To Reproduce
Steps to reproduce the behavior:

1. Given a main site with this plugin installed but not activated.
2. At least one subsite with this plugin installed and activated
3. In the main site create a user field required at checkout
4. It should affect main site and subsite checkout pages and it doesn't

Screenshots
If applicable, please attach a screenshot to make your issue clearer.

Expected behavior
A clear and concise description of what you expected to happen.

Isolating the problem (mark completed items with an [x]):

• I have deactivated other plugins and confirmed this bug occurs when only Paid Memberships Pro plugin is active.
• This bug happens with a default WordPress theme active, or Memberlite.
• I can reproduce this bug consistently using the steps above.

WordPress Environment

Details

WP Multisite 6.6.2 PMPro 3.3.1 pmpro-networks-subsite 0.5.3 PHP 8.1.29