Can I use 61W macbook charger

No problem.

See these support articles:--> Charge your iPhone with an iPad or Mac notebook power adapter - Apple Support

and/or:--> Fast charge your iPhone - Apple Support

Regards

Giulio

61watts will be a bit faster than the 20watts adapter , and no, it will not damage the phone.

You can use it but it will not be as fast as Apple's 20 watt charger.

You and Kirk need to coordinate your answers 😏

Lawrence Finch wrote:

You and Kirk need to coordinate your answers 😏

😅