When using snippets in Outlook for Mac, the expanded text is smaller than what is specified by both Outlook and what is manually set in Alfred.
Example is the snippet is set as Calibri, 10pt. The snippet expands as Calibri, 7.5pt. If it is set as 14pt, it expands as 10.5pt.
Outlook for Mac version 16.40 (20081000), MS 365 subscription
Alfred 4.1, Build 1167
Mac OS Catalina, 10.15.6