Transformations, create a transformation that would create a user data object structured the same as the one sent with ‘user-provided-data’ variable from the web.
Alternatively you have a dedicated tag for that in the server container (User-provided Data Event)
I have configured Enhanced Conversions Server Side using the Google Ads User-provided Data Event, and it seems to be working fine in Google Ads. However, I was wondering if there could be any issues with GA4 when using this method, especially when enabling “Allow user data capabilities” in GA4.