This was the first thing I looked for too. Perhaps one is planned or perhaps they're counting on the community to write one using their API.
TBH the only feature I truly use JetBrains for is their Cmd+Click to jump to definition, otherwise I'd be happy sticking with tmux+vim as IDE (as I did for about a decade).
I'm mostly well served by a slew of ruby/rails plug-ins along with tags - but this so answer might be a good, somewhat modern starting point. I'm going to check out if vimspector can help me with my debug flow:
I don't know which JetBrains product(s) you are referring to, but in IntelliJ you can use ⌘ + B to go a symbol's definition instead of using your mouse/trackpad with ⌘ + Click.
There's probably a similar shortcut in their other IDEs (try right-click > Go To > Declaration or Usages and note the key combination listed next to it).
Not to speak for parent comment, but the reason I use vim plugins in JetBrains IDEs is to have all that shit "just work". Yeah, you can setup stuff to autogen tags, but it's not always reliable. If you care about other IDE features (I do) then the list of crap you need to do to get vim/nvim to work properly piles up endlessly. I'll take the IDE with it's nice appearance and features and slap the keybindings in any day over the reverse.
I suspect the reason a lot of people don't seem to refactor their code is because they would have to do so semi-manually with whatever hip-but-feature-bereft editor they've sworn allegiance to.
ctags (which is the way I used to do it) was always sort of hit or miss for me. JetBrains OTOH just works. Apparently there's a new way of doing it though, which I should look into.
TBH the only feature I truly use JetBrains for is their Cmd+Click to jump to definition, otherwise I'd be happy sticking with tmux+vim as IDE (as I did for about a decade).