I have YouTube bookmarked to go directly to subscriptions and I have revanced configured to open directly to subscriptions. I’ve still seen trending as a tab in the sidebar on the website, and accidentally tapped on it back before vanced existed.

All of that said, I did just check and it’s way more difficult to find now. It’s near the bottom of the sidebar in browser, and iirc it used to have its own frustratingly dedicated tab in the mobile app, which it no longer does.