Let’s say there was a perfect API present and WA allowed you to use a completely FOSS app witch didn’t share any data with FB. But still FB will know everything they can still access all the metadata like earlier. The only thing they can’t access is analytics data but that can be easily blocked by DNS. And as far as Add ID goes use graphene OS it protects against that by giving each app different ID. So even if FB collaborated with other services to collect data as they do they won’t be able tie all back to you.
Let’s say there was a perfect API present and WA allowed you to use a completely FOSS app witch didn’t share any data with FB. But still FB will know everything they can still access all the metadata like earlier. The only thing they can’t access is analytics data but that can be easily blocked by DNS. And as far as Add ID goes use graphene OS it protects against that by giving each app different ID. So even if FB collaborated with other services to collect data as they do they won’t be able tie all back to you.