Privacy concerns

Hi, i just registered for a BitChute account, and when i went to search for something the search suggestions that popped up are searches I performed in my private Gmail account while looking for old emails. How does BitChute have access to these private searches performed within my email account??
Using Brave and Duck duck go and this has never happened before with any browser or search engine on any website!
I cant even get duck duck go to offer me search suggestions from browsing history so how does this happen??

Kevin