Stems, ties, measure numbers and grace notes are now independent in Linked Parts created in Finale v27.3. In the past, these parts needed to be extracted but all of this work can now be done within the same Finale file. Additionally, voiced linked parts will now also have correct grace note spacing, stem directions that face the correct direction, and second and unison notes with correct spacing. You can learn more about Linked Parts in the Finale User Manual here: Linking Details for Linked Parts (Mac/Windows).
If you are having trouble with utilizing this feature in Finale v27.3, please contact Customer Support by clicking Submit a request above.