my Searches in duckduckgo seem affected by my IP address

i vary my IP randomly to try to be tracked less on the internet by ad companies.

when using duckduckgo, i notice my results of certain searches seem slightly correlated to the IP I use if there's anything that could be impacted by location.

this is also not just country specific, where duckduckgo is narrowing this down based on country

i am not sure if duckduckgo is passing on the IP or if somehow bing has partnered with data centers or ISPs to try to guess the IPs going into duckduckgo.

I also may be sensing this correlation and it's just random and not there. i could be wrong.

Does anyone else ever notice this or wonder about this?