There are two systems for international reporting:
1, CRS
2, FACTA
1, This is an international money laundering / tax evasion system, where tax information is shared between countries.
2, This is only for the U.S. and was signed into law in about 2010. The vast majority of countries, (with the exception of those sanctioned), report to Uncle Sam on their 'U.S. Persons'. customers. Things like maximum account balance, which must then tie in with your reporting on FinCEN114 and 8938. Many will be asked their U.S. status, SSN/ITIN when signing up for an account, or dealing with law firms.
My gut feeling on what you say is that no, a 8858 is not required, as the rental is held as a personal property, (not in trust, business etc).
You could do what they call a 'quiet disclosure' and hope the IRS don't bite. You're in a tricky situation, but I would reach out to an international tax accountancy firm, (TFX, Greenback). They are internationally known and can better advise on your circumstances.
You do have complex issues and deep compliancy failures. Putting that to one side, I'd not go the DIY route on 8858's. Get a quote and sleep easy...