Any good Linux-friendly plugins for removing room reflections from voiceovers?

I record lots of voiceovers, but I'm having trouble with sound reflections. I've treated my space as well as I'm able, and that definitely helped. But I've hit the limit of what I can do there.

I'm still using Windows 10 at the moment on my main PC, but I'm using Pop_OS on my laptop. I'm going to switch over to that on my PC soon, too. And I'm using Reaper.

Do any of y'all have any suggestions for plugins that might help me?