Hello! I was hoping to try out the Power Armor Subclass for the Artificer, but can't seem to figure out how to implement the armor onto my character sheet. This is especially true in terms of adding the infusions to the individual pieces. Are there any plans to update this/is there a method I am missing?

Thank you!

The Armorer is currently an Unearthed Arcana (i.e. playtest/preview) subclass.  DDB does the bare minimum required to implement most Unearthed Arcana content.  Currently the system does not automate the Armorer's power armor feature.  You have to monkey with the character sheet to make power armor work, usually by customizing the base armor used as your power armor.

The two bonus infusions cannot currently be modeled - you have to keep track of them separately from the official Infusion tool, and similarly the base armor item can only be infused once.  Generally people get around this by creating the 'armor' infusions and then customizing their names (and weights/other stats, if necessary) to indicate that they're part of the power armor.  Bonus infusions are simply custom items on the character sheet and a bunch of manual stat-tracking.  

Ideally this would be addressed if the Armorer was ever made an official subclass, but until DDB gets around to finishing the multi-year process of rebuilding their code to accommodate nonstandard abilities, it's highly unlikely.  Sorry.