The premise is sound as a starting point for dating - to not take on a project thinking you can change them - but I'd question sticking firm to it in the long-term.
Some of those are not things you can determine for life. People's circumstances change, their finances change, their ambition changes, the desires for their lifestyle change. Continuing compatibility often comes through being able to discuss those things to an agreement to work towards rather than a starting point or current point.
Even emotional maturity, which I can agree should have a shared baseline to start with, can fluctuate with grief, stress, and other circumstance changes, and being able to talk it out even when an emotional mess has worked far more than the idea of needing to remain emotionally mature or being as emotionally as my husband who has 95%+ of the time has been far more emotionally mature than me.
Yes, equally yoked. It’s a fairly well-established expression meaning compatible or appropriately matched. What’s confusing about it?
It's confusing because it's not well-established in that way or any secular way. It's referring to Bible references about believers not marrying nonbelievers and well-established to be discussing that or not marrying those whose devotion to God is far weaker and/or instable. There is very common Christian advice to women to not date a man that they'll need to drag to church.
In recent years, it's been moved to discuss having similar views on major life decisions like raising children, handling finances, to be pulling together in the same direction as yoked oxen would, but it's still through the lens often used by certain American Christian evangelical groups - who are more likely to be Christian nationalists - that all of those should be in a particular Biblical bend.
Even in the attempts to secularise it where it's more shared worldview or goals -- those often change over the lifetime. I'm an entirely different faith, my worldview has drastically changed, and many of the goals I had when I was dating many years ago I've chosen to put down. That's part of life. Part of a solid marriage is being able to work through that as people change, not keeping things entirely equal between spouses.