Here’s a breakdown of recently added categories (since v3.31.0) from an Android teardown. Not sure if these show in a business account yet as I don’t have one!;
.\icn_category_equipment.png
.\icn_category_insurance.png
.\icn_category_inventory.png
.\icn_category_marketing.png
.\icn_category_other_income.png
.\icn_category_refunds.png
.\icn_category_rent.png
.\icn_category_sales.png
.\icn_category_services.png
.\icn_category_software.png
.\icn_category_supplies.png
.\icn_category_tax.png
.\icn_category_transfers.png
.\icn_category_wages.png
The icons for the above can be seen in the ‘New Assets’ section of this post (the middle 14 icons);