Is Aukey 29W Power Adapter is Okay and wont it harm my Device in fast charging ?

Hello kalana273,

I see you have a question about using a third-party power adapter to Fast charge your iPhone:

"Your iPhone fast charges up to 50 percent in 30 minutes when you use an Apple USB-C to Lightning cable and one of these adapters:

• Apple 18W, 29W, 30W, 61W, or 87W USB-C Power Adapter
• A comparable third-party USB-C power adapter that supports USB Power Delivery (USB-PD)"

If your adapter supports USB-PD, it should work to fast charge your device. As a side note, it's always a good idea to check out this resource and verify any third-party adapters you're using are Made for iPhone: Identify counterfeit or uncertified Lightning connector accessories

I hope I've answered your question. Have a good one!