There is a global mangrove layer in the ESA WorldCover 10m v200 for the year 2021, you can check it here: https://developers.google.com/earth-engine/datasets/catalog/ESA_WorldCover_v200
The best and most recent mangrove cover map is from the Global Mangrove Watch: https://www.globalmangrovewatch.org/?map=eyJiYXNlbWFwIjoibGlnaHQiLCJ2aWV3cG9ydCI6eyJsYXRpdHVkZSI6MjAsImxvbmdpdHVkZSI6MCwiem9vbSI6MiwiYmVhcmluZyI6MCwicGl0Y2giOjB9fQ%3D%3D
Global Mangrove Watch is an excellent global map, but it may have significant discrepancies/implications on the national scale. For example, I recommend reading: Changes in mangrove coverage classification criteria could impact the conservation of mangroves in Mexico. By Acosta-Velázquez et al. (2023) in Land Use Policy.