I live in Germany and didn't find a lot of information about voter suppression here. I don't think it is a big topic here and it's likely not as present. The requirement for voting is a German citizenship and it's recommended to bring a passport and ID, which I can imagine could be difficult for some people but it is required to have an ID as an adult here anyway. Voting can be difficult if you have a disability but you have the right to request an accessible polling station.
I am originally from the US, however, and there is a lot of voter suppression going on there. On social media, it is easy to find misinformation and be discouraged from voting, especially due to posts targeting specific groups. It would be important for companies to pass fact-checking laws. In California, voter suppression including for voters from abroad is comparatively low.
In my opinion, the provision of the Voting Rights Act struck down in Holder v. Shelby County must be reestablished to prevent voter suppression due to policies. Voter suppression includes: policies requiring proof of citizenship and other registration restrictions as well as voter ID laws, arbitrary requirements and criminalization of the ballot box, felony disenfranchisement, voter purges, and redistricting and gerrymandering. Voter fraud in the sense of saying you are someone else and voting under there name is very rare, only about 3%, whereas double voting or absentee ballots are bigger problems. I understand that it is important to prevent fraud but suppression and discrimination are not the solution.