When will apple come out with its own whireless charging system

Everyone including you will know when Apple make the announcement, until then nobody knows.

Hey! Thanks for reaching out.

Unfortunately, we don't know anything. Some rumors are saying march but nothing is confirmed.

https://www.macworld.com/article/3224389/mobile-accessories/apple-airpower-featu res-specs-price-faq.html

Macworld speculates that it will be by the end of March.