Embedding a link to show Google Streetview images for a point location can be accomplished by using configure pop-up for a point layer in an ArcGIS Online. To do this for a desired point layer in your ArcGIS Online map:
1. Click the more options (looks like three dots) button next to the layer and choose Configure Pop-up.
2. Under Attribute Expressions, click the ADD button, and paste the Arcade code found in...
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