That's not quite how it works. The Truss debacle made UK government debt significantly more expensive in comparison to other similar countries.
It's like having bad credit vs just the market being expensive.
Right now uk debt is more expensive than when Truss was doing her thing but it's not more expensive relative to other similar countries.
Truss was clearly responsible for the market rate we were paying at that time. Since then, under rishy and now Starmer our rate has normalised but the market cost in general has gone up.