Frustration and anger at US President Joe Biden’s handling of evacuations from Afghanistan are mounting among administration officials, lawmakers of both parties and advocacy groups.

As US diplomats hunkered inside, thousands of desperate Afghans thronged Kabul airport where five people were killed on Monday, prompting the US military to temporarily suspend flights to clear the airfield.

In a televised address on Monday, Biden acknowledged there were concerns about why Afghans had not been evacuated earlier, but said his administration...