You can make an Unarmed Strike as a Bonus Action.
Bonus Unarmed Strike
Raw data
{
"name": "Bonus Unarmed Strike",
"page": 101,
"level": 1,
"srd52": true,
"__prop": "classFeature",
"header": 2,
"source": "XPHB",
"entries": [
"You can make an {@variantrule Unarmed Strike|XPHB} as a {@variantrule Bonus Action|XPHB}."
],
"className": "Monk",
"classSource": "XPHB",
"basicRules2024": true
}