Here is some information from my refresh_token. I believe it hasn't expired yet, since I've recently logged in again using Steam Desktop Authenticator.
 
	Payload: 
	{ 
	    "iss": "", 
	    "sub": "", 
	    "aud": [ 
	        "web", 
	        "renew", 
	        "derive" 
	    ], 
	    "exp": 1762718905, 
	    "nbf": 1735992415, 
	    "iat": 1744632415, 
	    "jti": "", 
	    "oat": 1744632415, 
	    "per": 1, 
	    "ip_subject": "", 
	    "ip_confirmer": "" 
	}