Weekend sodium is my scale's favorite party trick. I'm 5'4, similar calories, and one Friday sushi dinner with soy sauce plus a Saturday brunch can hold 3-4 lbs of water until Wednesday. For 25 days straight? That's not weekends.
But here's my contrarian take: if your waist is down 2 inches and fasting glucose dropped 8 points, the scale is the least interesting number on your list. I'd track sodium and carb timing for 5 days, not to change anything, just to see if you're retaining.
My weird data point: a 45-minute hot bath the night before weigh-in dropped me 1.8 lbs, then it came back after coffee. So water is loud. I'd also take front/side photos in the same underwear and lighting every 10 days.
If those change while scale doesn't, that's recomp, not a plateau. What does your ring or watch band fit do? That's my cheap water meter.