It will also depend on which 61W charger is being used. The one from 2016-2017 doesn't support the 15V spec that the iPad uses. whereas the 2018+ does support 15v charging. with my 2020 11" when using a 61/87 watt charger I find that im stuck around 9v 2.6A where as with a IF complaint charger I can get 14.5v at 2.34A or 30W