The core idea
Government debt can affect yields through expected issuance, fiscal sustainability, inflation risk, economic policy and the amount of duration the private market must absorb.
What is happening underneath
More debt does not mechanically produce higher yields because monetary policy, demand for safe assets, currency status and economic conditions also matter.
How investors should read it
The composition and maturity of borrowing can be as important as the headline debt level.
The same market move can carry different information depending on which maturity, issuer and risk premium is changing. Read the question together with the underlying concepts rather than treating one price move as a universal signal.