Define "issued". M1 is typically checking accounts and cash. M2 is stocks and things that are easily convertible into money. The rest of the M's are defined similarly, but the exact definitions vary from person to person.

M1 is always an estimate for every country on earth because you can't just take a snapshot of every bank's ledger all at the same moment and expect all the money to be there. You lack the necessary time granularity and there's a lot of gray areas like money mid-transfer between banks (missing from one, not yet written in the other), money in a van on its way to being destroyed, money in a van from the mint to a bank, bankruptcy proceedings, etc. To work around that, central banks ask retail and commercial banks to provide monthly balance sheets to prove they are stable, and base estimates off that. The IMF/World Bank do something similar with central banks that are members.

The good news is that you can find M1 estimates easily from relatively authoritative sources[0] that are good about citing their sources.

[0]: https://fred.stlouisfed.org/series/MYAGM1CNM189N