Make cursor visible after startup without moving the mouse
Solution 1:
Hopefully you are still wanting a solution :-)
I got myself a micro PC for Kodi which is sitting behind my TV that is hanging on the wall, so no mouse and no keyboard, like you I use unified remote to control the pc and I ran to the same problem as you.
so, I tried many things and this worked for me:
gsettings set org.gnome.settings-daemon.plugins.cursor active false
run it in terminal and restart your PC, so far after every startup the cursor is there to see :-)