Column formatting allows you to have inbuilt buttons within sharePoint columns
Assumes URL_Folder contains a usable URL string (or hyperlink field that resolves as a string). If your column is a Hyperlink type and the link doesn’t open, see the “Hyperlink column note” section below.
Great — starting from your exact button formatter, the simplest way to show “Folder exists” when URL_Folder is populated is to wrap everything in a parent div and conditionally show either:
the button (when URL_Folder is empty), or a green “Folder exists” pill (when URL_Folder is not empty)
Below is a ready-to-paste formatter that keeps your current styling and adds the second state.

{
"$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
"elmType": "div",
"style": {
"display": "flex",
"align-items": "center"
},
"children": [
{
"elmType": "button",
"customRowAction": {
"action": "executeFlow",
"actionParams": "{\"id\":\"v1/1e1eb60d-cbe5-4899-9f3e-4bc8c5906ed7/72003966-3250-400b-8f86-bdb2ca7d018e\", \"headerText\":\"Create Staff folder \",\"runFlowButtonText\":\"Create Staff Folder\"}"
},
"attributes": {
"title": "Create Staff Folder",
"aria-label": "Create Staff Folder"
},
"style": {
"display": "=if([$URL_Folder]!='','none','flex')",
"align-items": "center",
"gap": "8px",
"padding": "8px 12px",
"border": "1px solid rgba(0,0,0,0.1)",
"border-radius": "999px",
"background-color": "#0078d4",
"color": "#ffffff",
"font-weight": "600",
"cursor": "pointer",
"box-shadow": "0 1px 2px rgba(0,0,0,0.12)",
"outline": "none",
"transition": "all 0.15s ease"
},
"children": [
{
"elmType": "span",
"attributes": {
"iconName": "FolderOpen"
},
"style": {
"font-size": "16px",
"line-height": "16px"
}
},
{
"elmType": "span",
"txtContent": "Create Folder",
"style": {
"white-space": "nowrap"
}
}
],
"hoverStyle": {
"background-color": "#106ebe",
"border": "1px solid rgba(0,0,0,0.15)",
"box-shadow": "0 2px 6px rgba(0,0,0,0.18)"
}
},
{
"elmType": "a",
"attributes": {
"href": "[$URL_Folder]",
"target": "_blank",
"title": "Open Folder"
},
"style": {
"display": "=if([$URL_Folder]=='','none','inline-flex')",
"align-items": "center",
"gap": "8px",
"padding": "8px 12px",
"border": "1px solid rgba(16, 124, 16, 0.25)",
"border-radius": "999px",
"background-color": "rgba(16, 124, 16, 0.08)",
"color": "#107c10",
"font-weight": "600",
"text-decoration": "none",
"white-space": "nowrap",
"cursor": "pointer"
},
"children": [
{
"elmType": "span",
"attributes": {
"iconName": "OpenInNewWindow"
},
"style": {
"font-size": "16px",
"line-height": "16px"
}
},
{
"elmType": "span",
"txtContent": "Open Folder"
}
],
"hoverStyle": {
"background-color": "rgba(16, 124, 16, 0.14)",
"border": "1px solid rgba(16, 124, 16, 0.35)"
}
}
]
}