super confused why my IP geo-location tool sometimes shows wrong country data for users, any ideas?

hey everyone, i'm pretty new to all this dev stuff, just launched my first little web tool called 'What is My Country? - Find Your Current Country & IP Location'.

it's a simple tool, shows users their current country and IP. but i'm seeing a really confusing issue where sometimes the IP geo-location feature shows the wrong country for users. like, someone in the US might see Canada, or vice-versa. it's not all the time, maybe 15-20% of requests, and it's super inconsistent. i'm using a popular free geo-IP database, but this seems off.

i've been trying to debug it, and here's a snippet of what the console output sometimes looks like, showing the inconsistent data:

// Example Console Output for 'What is My Country?' tool
[USER_SESSION_123] IP: 203.0.113.45 | Detected Country: Canada (Expected: USA)
[USER_SESSION_124] IP: 198.51.100.10 | Detected Country: Germany (Expected: Germany)
[USER_SESSION_125] IP: 172.16.0.1    | Detected Country: France (Expected: UK)
[USER_SESSION_126] IP: 203.0.113.46 | Detected Country: USA (Expected: USA)
[USER_SESSION_127] IP: 192.0.2.20   | Detected Country: Japan (Expected: Australia)

am i missing something fundamental about how IP geo-location works for web tools? or are there common pitfalls a beginner like me just wouldn't know about, that could cause such erratic results?