Google uses modern feature to fingerprint your past locations and your browser, DNS, existing cookies, advertising identifiers, and Chrome Sync + Previously recorded IP addresses and locations.
GPS, nearby Wi‑Fi access points, cell towers, Bluetooth devices, and device sensors when permissions or Google apps allow them. Browser/device characteristics such as OS, browser settings, screen properties, language, fonts, graphics behavior, and other fingerprinting signals. Fingerprinting can probabilistically recognize a browser even after its IP changes. Searches, Maps use, saved home/work locations, and Web & App Activity. Google explicitly states that saved activity and previous searches may influence location estimates. + VPN you're using has IP Adress shared, not dedicated, so it's more easy to detect for them.
Everything works perfectly on a PC, but the problems are only on a smartphone. Especially with a VPN/proxy from xeovo (for me personally). It even displays the connection country correctly, but Gemini doesn't work. When switching to a different VPN provider, everything is fine. And the fact that Google monitors everything it can is nothing new. As a last resort, we'll use Anti-Detect Browser and mobile proxies at the end