What is this part and where can I get a replacement?

I replaced my Nokia 6.1 (2018) screen a few weeks ago and noticed that the bluetooth and wifi hotspot signals are abysmal.

Last monday I happened to look at the old screen and noticed a piece of plastic stuck to it. I believe this to be the bluetooth/wifi antenna.

I can’t seem to find any replacement parts for it on ebay. Here is a picture of the part and the slot for it from this teardown video