MS Lists Lookup column not found in data object - sharepoint-online

Question

I have two lists A and B. I've created a lookup column on B to get data from A (item # and item address). I want to customize the view when opening an item on list B. But I can't find a way to make the fields from A visible on B. I get
Failure: TEST_x0020_SHIPPING_x0020_ADDRES1 was not found on the data object.
I checked the name of the field and it's correct and contains data. Please check the attached image. Is there a way to get that information on that view?
Note: if I disable debug it shows nothing.
Thanks in advance!
JSONERROR
Update: The code I'm using on the Header comes from the MS official site https://learn.microsoft.com/en-us/sharepoint/dev/declarative-customization/list-form-configuration
{
"debugMode": false,
"elmType": "div",
"attributes": {
"class": "ms-borderColor-neutralTertiary"
},
"style": {
"width": "99%",
"border-top-width": "0px",
"border-bottom-width": "1px",
"border-left-width": "0px",
"border-right-width": "0px",
"border-style": "solid",
"margin-bottom": "16px"
},
"children": [
{
"elmType": "div",
"style": {
"display": "flex",
"box-sizing": "border-box",
"align-items": "center"
},
"children": [
{
"elmType": "div",
"attributes": {
"iconName": "Devices3",
"class": "ms-fontSize-42 ms-fontWeight-regular ms-fontColor-themePrimary",
"title": "Details"
},
"style": {
"flex": "none",
"padding": "0px",
"padding-left": "0px",
"height": "36px"
}
}
]
},
{
"elmType": "div",
"attributes": {
"class": "ms-fontColor-neutralSecondary ms-fontWeight-bold ms-fontSize-24"
},
"style": {
"box-sizing": "border-box",
"width": "100%",
"text-align": "left",
"padding": "21px 12px",
"overflow": "hidden"
},
"children": [
{
"elmType": "div",
"txtContent": "='Store ' + [$TEST_x0020_SHIPPING_x0020_ADDRES1]"
}
]
}
]
}