Jira Custom Field in an Advanced Roadmaps Plan

Forge
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1

Hi!
I am creating a Forge plugin with custom fields.
In a manifest I created field with number type:

jira:customField:
  - key: my-custom-number-field
    name: My Custom Number Field
    description: Stores the number value.
    type: number
    readOnly: true

And I want it to be available in Plan and List views of Advanced Roadmaps. But when I try to add my custom field to this views it shows as unsupported and it’s type shows as “Number - My Custom Number Field” What can I do to make this field available in the Plan and List?