Actually, so far, we're impressed by the 5G networks in Croatia. Pretty much all three networks offer speeds greater than 1 Gb/s here (up to 2 Gb/s) with relatively low latency (~15 ms). The only place where they differ is coverage. Telemach built new network when new owner acquired them, they literally replaced all the base stations with new 5G ones and now have nationwide 5G coverage. Competitors, have 5G only in cities, outside 4G+. But overall network coverage is something you can't really complain on, especially after you've visited other countries.
Here are the coverage maps for those interested:
Telemach —
Pokrivenost | Telemach Hrvatska
HT —
Hrvatski Telekom - Karta pokrivenosti
A1 —
Karta pokrivenosti | A1 Hrvatska
And yes, it's still 5G NSA, but it's said they are getting ready to launch the 5G SA network this year. How we say here;
"živi bili, pa vidjeli" (we'll live, we'll see).