SP list lookup column show blank for read only user

I have SP list shared with read only group.

In this list there is lookup column sourced from another list.

Column value showing normal for me (List owner), but for read-only users it shows blank.

I tried column formatting to convert lookup value into basic text, but still no difference.

Any solution please?

{
"$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json ",
"elmType": "div",
"txtContent": "@currentField.lookupValue"
}