1 Tesla Model 3: 4,277
2 Volkswagen ID.3: 1,722
3 Hyundai Kona: 1,160
4 Kia Niro: 834
5 Renault Zoe: 704
6 Volkswagen Golf: 625
7 Nissan Leaf: 566
8 Audi E-tron: 493
9 Volkswagen Up!: 369
10 Porsche Taycan: 327
Source: https://www.bn.dk/bilmagasin/her-er-aarets-mest-solgte-biler...
So the Danish electric car market was somewhat diversified, but the Tesla brand was very strong back then. Still, you're absolutely correct that there were enough other electric cars sold back than that the comparison with the Model 3 is fair.
I mean, it wasn't even really reactive; the Leaf and Zoe came out at about the same time as the Tesla Model S, and weren't competing with it (they were well under half the price). They were quite old news by the time the Model 3 launched. The VW eGolf and BMW i3 also predate affordable (sub-100k) Tesla cars being available, at least in Europe.
Mostly because our number one car is not a truck and thus the competition had to react and build EVs to compete against Tesla.
Here are the numbers I found for 2020:
1 Renault Zoe: 99,261
2 Tesla Model 3: 85,713
3 Volkswagen ID 3: 56,118
4 Hyundai Kona: 47,796
5 Volkswagen eGolf: 33,650
6 Peugeot e208: 31,287
7 Kia eNiro: 31,019
8 Nissan Leaf: 30,916
9 Audi E-tron: 26,454
10 BMW i3: 23,113
So there are many more EV cars from other brands sold in 2020 than there were Tesla Model 3. The Tesla Model 3 represented at the very least less than 18.5% of cars as I only counted the top 10.
source: https://www.autocar.co.uk/car-news/new-cars/renault-zoe-ecli...