Did you install the SD card after you did the setup? Wondering because when you added the doorbell and chime to the app it could have been possible that the doorbell did not recognize you had an SD card in the chime and therefore not showing an option to record on to it?? So maybe removing the doorbell from the app and then adding the device back to the app will allow you to record onto the chime possibly…
I would do this first before doing what I have written below or contact eufy support through the app.
See if this option is available.
Open the settings for the doorbell and then go to Wi-Fi connection.
Do you see connect to HomeBase?
If so, tap on that and if it asks you to add a HomeBase, select MiniBase chime as the HomeBase.