QtWebBrowser is an open source project developed by QT. You can see the details in the following links;
Please use a Ubuntu Desktop 20.04 to build the snap. Clone the repo and run
snapcraft --use-lxd
You can install the snap package that you built with
snap install qtwebbrowser_0.1_amd64.snap --dangerous
Please note that, QtWebBrowser requires mir-kiosk pre-installed.
and provide feedback ;)