Hi @Mark Gorelyk
You could set default value for column here:
You could also meet your requirement using pnp:
$SiteURL = "https://Crescent.sharepoint.com"
$ListName = "Team Documents"
$ColumnName = "color"
$DefaultValue = "1"
#Connect to PnP Online
Connect-PnPOnline -Url $SiteURL -Credentials (Get-Credential)
#Set Default Value for the field
Set-PnPField -Identity $ColumnName -List $ListName -Values @{DefaultValue=$DefaultValue}
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