As DHF previously, brilliantly, stated, you can hear the same harmonies in very, very, very many songs. Like Faded by Alan Walker. However this doesn’t mean anybody is copying anybody. Similarities can be heard in everything. Otherwise you can go on and say “Mondello copied Bla Bla, and Bla Bla copied Huh” all the way back to the stone age. If this is the basis it’s a very thin argument.
I dropped a cd with some of my music years ago at a Gigi Live. So I claim now that Lentonauta is made by me and Gigi stole it!