Downcut bits are very useful. Can be harder to find.

Saite_cutter store on AliExpress sells some downcut bits. Also known as left hand bits.

Store Information
https://s.click.aliexpress.com/e/mW45b6SG

AU $28.64 9%OFF | 2Pcs 6x25mm Down Cutter Left hand Spiral Bit CNC Router Tool AAA Series One Flute acrylic Aluminum carving frezer endmill
https://s.click.aliexpress.com/e/tuaU3ggC