The UK has been trying to be closer to India to have something to show for having exited Brexit - closer trade ties would be a victory. This is with elections for the Tories looming, and with an Indian-origin PM, uniquely positioned to strengthen ties.
The US is courting India as part of an anti-China bulwark, along with those in South East Asia (Vietnam w/ the elevation of the US to the highest bilateral status during a Biden visit; the Phillipines with close military co-operation, including Taiwan invasion drills.) Biden also met the C5+1 nations in Central Asia, and that's part of both pushing against Russia and China.
In this environment, these two countries don't want to needlessly antagonize India.
The US is courting India as part of an anti-China bulwark, along with those in South East Asia (Vietnam w/ the elevation of the US to the highest bilateral status during a Biden visit; the Phillipines with close military co-operation, including Taiwan invasion drills.) Biden also met the C5+1 nations in Central Asia, and that's part of both pushing against Russia and China.
In this environment, these two countries don't want to needlessly antagonize India.