I’ve written this up as a feature request here
As a work around - can add a role
Go to Theme > Roles and create a new role “filled-icon”
Then in theme.css add the following:
.anvil-role-filled-icon .material-symbols-outlined {
font-variation-settings:
'FILL' 1,
'wght' 400,
'GRAD' 0,
'opsz' 24
}
When you change the role of a component to filled-icon
it should now have a filled icon
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