How to LEAVE A VOICEMAIL in MESSENGER?

so when you try to call you can just also leave a voicemail so here is a new feature which you can just tap and leave a voicemail and then yeah this is uh yeah this is a new kind of feature which you can try to use uh yeah and yeah that's basically when you make a call on messenger and there is no response or something like that you can just leave a voicemail