See https://community.tp-link.com/us/home/forum/topic/623812 It's definitely a feature they need but do not have.

Most people want to share some things on guest network rather than complete isolation. I'm sure Google did some marketing study to figure this out. I wish you all would do same....

I currently have Google nest Wi-Fi and I was about to upgrade to deco mesh. In Google you can share devices like a tv or chromecast with people on your guest network following simple instructions...