If you care about the person and want to talk with them, reach out and be genuine. If not, don't bother them with LLM corporate-speak masquerading as support. Let's be honest: they didn't "part ways" with the company--they were fired.
Right now, they're worried about paying their bills, not about making their former coworkers feel better.
If you really want to help, reach out to your network and see if anyone is hiring. I've successfully connected many laid-off former coworkers with new opportunities. I've even approached recruiters that I ignored saying, "I'm not available, but this person is looking, and they're excellent."
- “Hi <firstname>, sorry to hear what <company> did to you; that was a real dick move! I appreciated your efforts and wish you the best!”
- Offer to help, and follow-up.
- Only trash the employer if they deserve it, and have a conversation about why they're trash if the person is interested. If they start that, say “Yea, those guys are cunts. Especially your boss Ed. He's incompetent, and has been blocking you and the team ever since he got promoted. They should have promoted you or Stacie instead.”.
- Carry on the conversation if they're interested. A lot of colleagues don't stay in touch when people get fired. Stay in touch! You'll both be better off for it. Making friends is hard, and losing them is easy.
- Say things like “wish we could have kept you” or “you were such a great performer. I know why you were laid off, and was a dumb move on the company's part. I'm interviewing at other places now, and will leave as soon as I find a replacement; this is a sinking ship. Let me know once you find something - I'm interested too!”