Yep, although I love Spark, sometimes they make a big deal about some features (x-callback-url and Shortcut integration) but its pretty limited and not helpful.
Is there a reason you want to compose directly from Spark?
I run a shortcut to grab data from Airtable and compose an email. On my iOS devices I use Spark and the Gmail app. The latter is not an option for this…so need to go with Spark.
Don’t want to install another email client just for this one email. Using the mail.app is also not an option.