Hi.....
Yes you can access old cash app account from other phone for that you need to reset your phone and email on cash app. You need to navigate to support and point to something else and their you will see the option can't access account in that write up about your problem to cash app team and they will verify your identity and let you access old cash app account.
you can get the more information then click here Outlook
If you cant access my cash app account then you can check this blog it hs detailed information on how to access and check