Wiktionary
loop in
vb. (context transitive English) To include in communications about something; to keep informed about something.
Usage examples of "loop in".
He tied a large loop in one end of the rope with a slipknot and carefully coiled the remainder.
Reynolt skipped through what must have been a long, trapped loop in poor Wen’.
Before I go, I will tie a fixed loop in this end to fit around you.
In fact, the two of them were trapped in a feedback loop in which their shared fear fed upon itself and grew strong.
After that, Merlyn stuck six of the tail feathers round the pigeon in a circle, and made a loop in a long piece of string to go round the feathers.