Cloudflare kullanıyormusunuz hocam?
Eğer kullanıyorsanız Cloudflare Dash. > Firewall > Firewall Rules (+ Create a firewall rule > Edit expression)

Yazdığım Ekliceğiniz kural,

(http.user_agent eq "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 OPR/73.0.3856.284") or (http.user_agent eq "Mozilla/5.0 (Windows NT 10.0; WOW64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 OPR/73.0.3856.284") or (http.user_agent eq "Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 OPR/73.0.3856.284") or (http.user_agent eq "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36 OPR/73.0.3856.284") or (http.user_agent eq "Mozilla/5.0 (Linux; Android 10; VOG-L29) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Mobile Safari/537.36 OPR/61.1.3076.56625") or (http.user_agent eq "Mozilla/5.0 (Linux; Android 10; SM-G970F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Mobile Safari/537.36 OPR/61.1.3076.56625") or (http.user_agent eq "Mozilla/5.0 (Linux; Android 10; SM-N975F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Mobile Safari/537.36 OPR/61.1.3076.56625")

Useragent list kaynak: https://www.whatismybrowser.com/guid...er-agent/opera