repo funding rates don't affect US treasury yields immediately due to time scale treasury bond yield expectation is over 10 years, and repo rates are a short-term debt funding mechanism so the rates shock would need to be prolonged/pronounced to affect treasury rates
funding rates on repo markets & bond yields are not the same different timescales: 1๏ธโฃ repo - short-term / โday(s),week(s) 2๏ธโฃ treasury bonds - โ10 years so even if a funding rate raises for a few days, the longer-term bond yields may not be affected