They have never suggested it has "gone away", or anything close to that.
"while the pandemic is not over, we have now passed the peak of the Omicron wave, with cases falling, hospitalisations in England now fewer than 10,000 and still falling [...] we now have sufficient levels of immunity to complete the transition from protecting people with government interventions to relying on vaccines and treatments" comes pretty close to saying the threat has gone away IMO.
The claim that Omicron had reached its peak has also aged badly, as it now looks like it was a ripple in front of the wave:
They are saying we are now entering the phase where we will have to live with it as "normal", just like flu etc.
I don't think that is what they're saying but even that would be ridiculous because the less-deadly omicron is still worse than flu and how many suffer from "long flu"?
I could speculate on why they are saying these misleading things, but that would be political so better on NACA if you want.