The Delta variant was first discovered in the US in February and was already over 1% of US COVID-19 cases by the first week in May: (https://covid.cdc.gov/covid-data-tracker/#variant-proportions).
We've had several months of resolved cases, breakthrough cases, reinfections, etc. None showed any sign of ADE. There is some resistance to antibodies of previous variants of COVID-19; not ADE. It doesn't take long to know when ADE is present as you see mass reinfection with more severe outcome. Not happening with Delta. Didn't happen with any other variant either. If we were going to see it, it would almost certainly have happened by now and the first people to show signs of it would probably be the ones previously infected. That's how ADE works most of the time.
Of my crew.
All of the current Covid infections are vaccinated.
None of the natural immunity (recovered vid) are.
Small sample size, but I am seeing that in wider circles.
Some of the vaxed are VERY sick.