Actually, this claim was seen here:" https://www.google.com/search?gws_rd=cr&gl=us&q=FBI%20and%20Secret%20Service%20were%20involved%20in%20planting%20the%20bombs%20site:freerepublic.com
A FF extension 'https://addons.mozilla.org/en-US/firefox/addon/search-site-we/ can help.
As you say, I’m sure it has been posted here many times. I think I was first pointed to the ongoing Revolver site investigation from here a couple years ago. Been following it since. They did some great detailed investigative work to expose it. So the X sources are real late to the party.
https://revolver.news/2022/01/the-essential-revolver-news-january-6-reading-list/