HDR Video compatibility

Hello,

I've just received an iPhone 13 pro max, and have a question regarding the HDR video.

I'm using a late 2013 iMac with Final Cut Pro for my video editing, but I'm running on High Sierra.

When I tried to set up HDR video on the iPhone, it mentioned that this would only be compatible with Catalina or above.

The sample footage I just filmed using HDR video looks awesome on the phone screen, but completely blown out when captured and viewed in FCP.

My question is, if I upgrade OSX and FCP and edit footage recorded in HDR video in FCP, will people with OS earlier than Catalina (or other operating systems/screens) be able to view it in all it's glory?

What is the best way to navigate this new tech?

Thanks

Dave