New field is present in the index but not in the Discover tab

[lemon]

Hi, I have created new fields with kv filter, they exist in my index, I can use them in my visualisations but these fields don't appear in the available field in Discover tab. They only appear in the available fields if I use one of them for filtering. Is it regular? I have refreshed the field list of the index but i doesn't work.
Thank you in advance for your response.
For example mapping of a field which is not present in the Discover tab but present in the index:
{
"logstash-2018.11.19": {
"mappings": {
"text": {
"meta.Geolocation": {
"full_name": "meta.Geolocation",
"mapping": {
"Geolocation": {
"type": "geo_point",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
}
}
}
}
}
}
}

[Marius_Dragomir]

They don't show up in the list on the left side or don't show up for any document in Discover?

[lemon]

They don't show up in the list on the left side.