That "minor" detail seems to have been outside of all popular reporting I've read on the subject, any links to how large a part the EU would've contributed?
It was in the news (at the very least DN) a couple of months after the current government scrapped the plans for high speed trains. So Dec-Jan 22/23 or so. Googling for it to find the details have proven to be hard, so I can't say for sure if those articles referred to grants part of the CEF program, but very probably so. And I also obviously can't give any numbers without refinding those articles. But it was a fairly large share, based on memory.
EDIT: Found it! https://www.dn.se/ekonomi/regeringen-bad-eu-andra-tagkartor-... mentions it and that the possible numbers were really high, upwards 100GSEK or more. But only 'possible' numbers and not granted ones, so who knows how much it would have been in practice.
Getting to 200 was mostly a matter of upgrading tracks that needed maintenance anyhow in the 90s, in the 90s however cargo traffic wasn't causing as many disruptions and congestion as today and the talks about "new exclusive" lines is mainly meant to shift air-traffic to faster AND non-congested lines, but new lines are far more expensive/prohibitive both due to new land requirements and making it a "big-bang" build.
