I am finally able to start utqemu using this command:

qemu-system-x86_64 \
-enable-kvm \
-m 2G \
-device virtio-vga-gl,virgl=on \
-display gtk,gl=on -netdev \
user,id=ethernet.0,hostfwd=tcp::10022-:22 \
-device rtl8139,netdev=ethernet.0 \
/root/snap/utqemu/common/ubuntu-touch-mainline-generic-amd64.img

-display sdl was not working for me.
But with this command, the resolution I am getting for ubuntu touch is really not good (image shown below)

Please help me resolve this resolution problem.

Thanks