How to use Arduino Leonardo as ISP Programmer for Atmel

Hi there,
I was trying to use an Arduino Leonardo as an ISP programmer for an AtTiny44. It worked well on my colluages macbook pro, from the arduino IDE and from VSCode+platformio. However on windows 10, the flashing process would always timout with a not in sync message.

Since I was using the same ISP Code on the Leonardo and the same cabling this could not be the cause of the problem.

When trying to solve this, I went back to the Arduino IDE and figured there is a seperate menu option to use 32u4-based Arduinos as ISP like the Leonardo. However, I could not find any information on how to change the platformio.ini file accordingly to make it work from platformio as well.

Does anyone know how to solve this?

Kind regards,
Felix