format options on relationship manager select in attach form

Is there a way to set the format on options for the select when attaching on a relationship manager?

I basically would like to concatenate first_name and last_name in the options, but cant figure out how. I can do it on regular selects using getOptionLabelFromRecordUsing but it does not seem to work on the Attach action select.

Here is what I'm doing:

 AttachAction::make()
->form(fn (AttachAction $action): array => [
    $action
    ->getRecordSelect()
    ->getOptionLabelFromRecordUsing(fn(Model $record) => "{$record->first_name} {$record->last_name}"
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