So? They are given separate from the ten commands, and were never called the covenant on two tables of stone, as the Decalogue was.
Thus the two love commands which Jesus and Paul said fulfills ALL THE LAW of God, have superseded and replaced the Decalogue, which once again WAS the old covenant, and thus by necessity ended when the old covenant ended and the new began.
So I hate to spoil your trump card with the revelation that the two love commands appear in the old covenant, but I already knew that.
And there’s no days to be kept in the two love commands - which is why the SDA fights so hard against the fact that the two love commands replaced the old ten, because they want to continue keeping the ended day of rest.
Not my trump card. Just bringing it up. i didn't see it in your posts. (Stuck it in there so others could see it is OT)
As for the two commands fulfilling all of the Law of God-
Who said they didn't ? The 1st four commandments show love to God and the last six show love for your neighbor.

The Law cannot be fulfilled without love.
Those two commands are the heart of the Law.
Thou shalt not steal is a law. We keep it because we can go to jail if we don't. that is the legal sense. But what Jesus is saying is that law is fulfilled when we keep it because we love our neighbors, and wouldn't think to do them harm.
As as for Sabbath, I keep it because i feel convicted to do so. It is my way of proving love to the Lord. That does not take away from you. Do want you want. But I do not believe God would put a ceremonial law in with the 10.