Thanks for your help,the problem solved!!
I just found that it’s because my xstore email builder been overwritten by UM.I already disable UM email notification.Thanks for your help!
I tried to disable all my 3rd party plugins,and found out that only when I disable UM,my email notification made by xstore build-in email builder can be sent successfully.
I used new register notification email as testing,the correct one made by xstore email builder should be like this:https://prnt.sc/xQVakpqXu8uP
and if I activate UM and send it again,I’ll get the email that I think is from woocommerce default email like this:https://prnt.sc/402huVLwKRM5
