China is worried about the Quad as the US views the budding alliance as a springboard for its policy in the Indo-Pacific and India sees in it a strategic counterweight to a belligerent Beijing.
He added that it was 'sad' the prime minister was the only guest not physically present at the outreach meeting.
G-7 superpower the United States has been pressing the G-7 to take a tougher stand against autocracies like China and Russia.
The Bidens are in Cornwall, southwest England, where the U.S. president is attending a Group of Seven wealthy democracies summit.
The bike gifted by Biden was made by Bilenky Cycle Works, a business with a staff of four who usually take up to 18 months to make a machine.
Public health advocates said much more than just doses was needed, including money and logistical help to get shots delivered in poorer countries.
Calling for global unity, leadership and solidarity to prevent future pandemics, Modi emphasised the special responsibility of democratic and transparent societies to deal with the challenge.
Biden and Macron met on Saturday as part of the Group of Seven summit in southwest England, where they and other leaders of the world's wealthy democracies are discussing the coronavirus pandemic
The club of leading economies -- Britain, Canada, France, Germany, Italy, Japan and United States -- say a joint approach is the world's best chance for recovering from the global health crisis.
The cost of donating the UK's surpluses will be classified as overseas development assistance (ODA) and will be in addition to GBP 10 billion already committed in aid this year.
Campaigners say the G7's inoculations pledge for this year and next -- including 500 million US doses -- is far too little, too late to end a pandemic that has claimed over 3.7 million lives worldwide
Since the G-7 last met two years ago, the coronavirus pandemic has killed more than 3.7 million people and decimated economies with lockdowns and layoffs.
The letter, shared on UNICEF's website, stated that the upcoming G7 Summit will be a vital opportunity to ensure that vaccines are able to reach the "vulnerable populations" across the world.
The three-day summit will cover a range of issues, with a particular focus on how the group can lead the global recovery from coronavirus.
Johnson has been promoting the G7 meeting as an opportunity for Britain to assert itself on the global stage following the nation's departure from the European Union.