Apache config reverse proxy setup

I have a working nginx config for a reverse proxy that needs to be mapped to Apache. Should be relatively straightforward, main issue is https to http proxy. Web server sits in front of a series of react js apps that need to be able to communicate with a backend listening on a designated port. proxypass /backend to http://localhost:<port>. Server sits on public internet and domain name resolves to public IP, incoming traffic is HTTPS.