You can filter your heatmap results by specific device and view the results of that filter by navigating to your heatmap list, then selecting the Add Filters menu.
Then, use the filters on the heatmap list to filter for one or more device types
View mobile version of the page using Developer Tools
After adding the filters, open the heatmap. You can then use your browser's Developer Tool's in device mode to view the mobile version of your website. You can do this quickly by pressing
Ctrl + Shift + I then
Ctrl + Shift + M
Once you have chosen the view you want, you can view and navigate your site just as if you were on the actual device you've chosen.