dnd 5e – Can an Alchemist Artificer use Alchemical Savant on the casting of a spell with no Material components?

All Artificer spells have material components and require a focus.

With the November 2020 errata to the Artificer class, the Artificer’s spellcasting feature now reads:

You must have a spellcasting focus—specifically thieves’ tools or some kind of artisan’s tool—in hand when you cast any spell with this Spellcasting feature (meaning the spell has an ‘M’ component when you cast it).

You must have a focus to cast any of your artificer spells, which means every artificer spell you cast has an M component, even if the spell description doesn’t say it has M components.