Same as what the others said: in France, non-French EU citizens can vote for EU parliament and municipal elections (electing a mayor). However, you need French citizenship in order to vote for your parliamentary representative (which could be misunderstood as “local” as it is on a district level), and for presidential elections.

I’m actually curious to know why local elections specifically, if it’s an EU directive or just “common” ?

Hm, they have control over the instance but not directly (except if they fork etc) over the software? So comparing to reddit they can’t modify the UI to include ads, can’t inject tracking, etc.

I want to see it with the frog’s tongue sticking out

if anyone’s interested, they have a cool shop with all kinds of sizes and support types for their work: https://www.inprnt.com/gallery/jramseyi/bow-mouse-riding-a-barn-owl/