You can display an image map layer from an image service. More information about Map Services can be found in the L.esri.ImageMapLayer documentation.
<html>
<head>
<meta charset="utf-8" />
<title>Simple ImageMapLayer</title>
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no" />
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" crossorigin="" />
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js" crossorigin=""></script>
<!-- Load Esri Leaflet from CDN -->
<script src="https://unpkg.com/esri-leaflet@3.0.12/dist/esri-leaflet.js"></script>
<style>
html,
body,
#map {
padding: 0;
margin: 0;
height: 100%;
width: 100%;
font-family: Arial, Helvetica, sans-serif;
font-size: 14px;
color: #323232;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
const map = L.map("map").setView([37.75, -122.23], 10);
L.esri
.imageMapLayer({
url: "https://landsat.arcgis.com/arcgis/rest/services/Landsat/PS/ImageServer",
attribution: "United States Geological Survey (USGS), National Aeronautics and Space Administration (NASA)"
})
.addTo(map);
</script>
</body>
</html>