Although this post might be old and probably the requester may have solved this issue, here is my contribution to anyone who has the same problem:

• Instead of using the reactable package try to use the gt package.
• This link here shows how to do it: Add any Plot to your {gt} table
• If you want to do it in Shiny, this link shows how to do it: Create a gt display table output element for Shiny

I hope these tips can help you. Enjoy!!