It should not. Emailed reports were already emailed as the app links.
But it is still working to email reports as report.xlsx files using API and crone script on server side
for example
response=$(curl -X GET "$traccarUrl/reports/trips?${deviceIdsQuery}from=$startDate&to=$endDate&format=xlsx&mail=true" \
-H "Authorization: Bearer $token" \
-H "Accept: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
For now yes, the API is still there. But it will be removed eventually.
I note that the release notes for 6.11 say:
How does this impact Scheduled Reports that are automatically Emailed?