SharePoint online event calendar view color formating not working - Please help

Hi all,

I am facing a strange issue and i tried so many troubleshooting but unable to figure out what is going wrong. I have done the following steps for the event calendar view ( Type Event list)

1) Made sure event type column is selected in the view im using

2)Formatted the view with color codes below json for your reference ( internal name chosen is correct)

{
"$schema": "https://developer.microsoft.com/json-schemas/sp/v2/row-formatting.schema.json",
"additionalEventClass": {
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"People Manager"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgDarkRed' , 'sp-css-backgroundColor-BgCoral sp-css-color-CoralFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"Diversity and Inclusion"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgGreen' , 'sp-css-backgroundColor-BgMintGreen sp-css-color-MintGreenFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"Wellness"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgBrown' , 'sp-css-backgroundColor-BgGold sp-css-color-GoldFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"Performance Framework"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgDarkGreen' , 'sp-css-backgroundColor-BgSage sp-css-color-SageFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"High Potentials Program"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgBlue' , 'sp-css-backgroundColor-BgCornflowerBlue sp-css-color-CornflowerBlueFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"Training and Development (inhouse)"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgDarkBlue' , 'sp-css-backgroundColor-BgLightBlue sp-css-color-LightBlueFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"Recruitment"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgDarkPurple' , 'sp-css-backgroundColor-BgViolet sp-css-color-VioletFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"Surveys (Engagement/Pulse/Other)"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgLavender' , 'sp-css-backgroundColor-BgLightPurple sp-css-color-LightPurpleFont')+' sp-field-fontSizeSmall'",
{
"operator": ":",
"operands": [
{
"operator": "==",
"operands": [
"[$EventType0]",
"Staff Gatherings"
]
},
"=if(@isSelected == true, 'sp-css-color-WhiteFont sp-css-backgroundColor-BgDarkPink' , 'sp-css-backgroundColor-BgLilac sp-css-color-LilacFont')+' sp-field-fontSizeSmall'",
""
]
}
]
}
]
}
]
}
]
}
]
}
]
}
]
}
]
}
}

Appreciate your insights on this