Dude, I had a colleague, senior to me, do the opposite. I had an idea that I struggled internally to get off the ground for months and months. I pretty much did all the research, found the contacts, got the architecture direction, sought feedback and buy in from multiple stakeholders - including him. Practically I was ignored.

After about 6 months, he's presenting this identical idea to our team!

Guess what, it was approved by upper management!!

Except, the lack of details he had in his super high level stuff lacked any insights, so I called him out in the next meeting and basically said have you seen this document I've been socialising for the last 6 months!?

He said it was 'different'..