> we don't have such problems

Yet. Because you're still on compliance and procurement whitelists. If UK's regulation are no longer up to EU's standards, UK drops out of the whitelist and any supplier there jumps off the fast-track into the slow lane of "compliance audit". Spoiler: that's the point at which the contracting manager drops you for your far less able competitor that's hosted in Dublin or Amsterdam.

For how long now? Could it be that many EU potential customers haven't even talked to your company since 2016, and the people who are still talking to you are the ones who aren't worried about exporting their data outside of the EU?