Problems with periodic copies

[s3r3ft]

How about, I have a problem with my freenas, to which I have set several periodic tasks for the copies, but I see that these are not executed, I have them well configured, but I do not know what can be missing, or case it will be some problem with the software freenas?

 

[artlessknave]

the snapshots in the screenshot appear to be from 2018? you are only seeing the oldest snapshots of 182,566 snaps. I think you need to look at the snaps that aren't a year old first.
it looks like your configuration would result in 2 snapshot per day. 6 hour interval means 06:00, 12:00, 18:00, but you have the time limited to 07:00-19:00.