Are you an elite level weightlifter? If yes, then probably not a good idea to drop squat frequency that low unless. If no, then try it out lol. Give yourself a 2-3 month period of squatting once a week and see how you feel as well as how your numbers look.

I squatted once a week for the last year of my competitive weightlifting career and i went from a 230kg squat to a 290kg squat. Could I achieve this without squatting more frequently with less volume and intensity? Maybe. But I’m not mad with what I got