Re: This is not the first time this has "accidently" happened
For blocking YT ads, try adding these blocklists to Pihole. I have them in my Pihole config, and without any blocking at the PC or phone level, don't get YT ads when viewing through either browser or app:
https://raw.githubusercontent.com/kboghdady/youTube_ads_4_pi-hole/master/youtubelist.txt
https://raw.githubusercontent.com/kboghdady/youTube_ads_4_pi-hole/master/crowed_list.txt