The newer satellites, of which 5 are in orbit, also have a directional antenna with which they will be able to boost the signal strength 20 dB (100 * power), using a new military M-code that no longer needs the other signals to lock on. The signal is sent both over the wide area and the spot beam antenna. Older satellites will only sent it over a wide area antenna. As far as I understand, this is not operational yet, but is planned for this year.

It is, but the US basically can't use that mode anymore - the widespread use of GPS guided munitions which do not have the military grade receivers means the US basically doesn't enable the signal degradation mode ever - it harms their own force more then helping any counter-force.

You're talking about SA (Selective Availability) but I think the parent comment is referring to the "fine" signal: https://en.wikipedia.org/wiki/GPS_signals#Precision_code

Or more likely the M-code which is the upgraded version of the P(Y) code.

Why do you assume munitions don’t have the “military grade receivers”?

Yeah, but that’s all worthless now. The US has lost the number of GPS satellites in the sky. It’s all Russian and EU sats now.