Can I use
?

gap property for Flexbox

- WD

gap for flexbox containers to create gaps/gutters between flex items

Chrome

  1. 4 - 83: Not supported
  2. 84 - 103: Supported
  3. 104: Supported
  4. 105 - 107: Supported

Edge

  1. 12 - 83: Not supported
  2. 84 - 103: Supported
  3. 104: Supported

Safari

  1. 3.1 - 14: Not supported
  2. 14.1 - 15.5: Supported
  3. 15.6: Supported
  4. 16.0 - TP: Supported

Firefox

  1. 2 - 62: Not supported
  2. 63 - 102: Supported
  3. 103: Supported
  4. 104 - 105: Supported

Opera

  1. 9 - 69: Not supported
  2. 70 - 88: Supported
  3. 89: Supported
  4. 90: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 104: Supported

Safari on iOS

  1. 3.2 - 14.4: Not supported
  2. 14.5 - 15.4: Supported
  3. 15.5: Supported
  4. 16.0: Supported

Samsung Internet

  1. 4 - 13.0: Not supported
  2. 14.0 - 16.0: Supported
  3. 17.0: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 64: Supported

UC Browser for Android

  1. 12.12: Not supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 104: Supported

Firefox for Android

  1. 101: Supported

QQ Browser

  1. 10.4: Not supported

Baidu Browser

  1. 7.12: Not supported

KaiOS Browser

  1. 2.5: Not supported
Resources:
Chrome bug to track implementation
Webkit support bug
MDN browser compatibility
Workaround using negative margins
Spec discussion