Price barrier from European seller

Hi all from a newbie.

There’s a product I have been selling successfully on another platform and noticed only one other seller on Amazon. Their price is nearly 5 times the UK price hence my decision to start selling on here.

I’ve finally got myself accepted and added to the product, so far so good. In a search, the price still shows as the much higher price - a clear barrier to sales for me.
The other seller is in continental Europe and is listed as “just launched”. I have product in stock waiting to go, UK delivery is much quicker from me, but I feel it is just going to sit there doing nothing unless I can find a way.

I would really appreciate any advice on how to kick start this, please.

Thanks,
Mark