When using the Parse JSON action in Power Automate, flow will guess what type of data your fields are. Sometimes it guesses incorrectly, such as thinking a number field should be a text string.

When this happens, you will only be able to select the field for test fields, not number fields in update record steps.

To fix this, simply delete the “type” line from the JSON schema. Then the field will be available to be selected for all field types.