Timelinize… description from GitHub: Organize your photos & videos, chats & messages, location history, social media content, contacts, and more into a single cohesive timeline on your own computer where you can keep them alive forever.

There’s also Delta Chat, FairEmail and DEFINITELY LOCALSEND.

I’m going to choose a VM.

Linux Mint is supposed to come with Flatpak support by default. Running flatpak remotes shows that I have flathub configured:

Name    Options
flathub system

That said, thank you for answering! I appreciate it, even if it doesn’t solve my issue.