https://www.amazon.com/Whiteside-Router-Bits-1084-Straight/dp/B000K2C6VO/ref=sr_1_18?crid=2AKWGQ4WIH7H&keywords=3%2F4%22+straight+bit&qid=1653743602&sprefix=3%2F4+straight+bi%2Caps%2C87&sr=8-18
Something like this but if you are planning on putting 3/4" plywood into the dado then you will need undersized plywood bits like this
https://www.amazon.com/Whiteside-Router-Bits-1083A-Straight/dp/B000K2G160/ref=sr\_1\_43?crid=I0K4T2PJSW7J&keywords=3%2F4%22+plywood+bit&qid=1653743659&sprefix=3%2F4+plywood+bit%2Caps%2C85&sr=8-43#customerReviews