Can a company terminate someone on parental leave?

I work for a company and I am currently on a parental leave. The division of the company I work for has since been shut down and I have no job to return to.
Since I am on leave, I heard this news from a colleague at a different company – no one (not even human resources) reached out to me to advise me of the closure. I contacted HR to find out exactly what was going to happen to me. HR advised that most likely no “like positions” would be available to me when I return and I would be given a severance when I do “try” to come back. I was not told the exact dollar figure of the severance, although I think this is important information for me to know.
Shouldn’t the company tell me exact figures of a potential severance package and secondly, shouldn’t they be obligated to provide me a position with a similar salary upon my return?