Wi fi issues

Hi Viewing video on my new Ring video doorbell is fine when I am sat in the house. If i go down the garden my phone switches to 5G and it takes a couple of minutes for the phone to pick up the video, once picked up the signal drops every 30 seconds or so. Am I right in thinking that you should be able to view the cameras from virtually anywhere? I have an RSSI of -45, an upload speed of 39.49 and a download speed of 13.25 (on full fibre)