How to get proper information about user agent in nginx log?

Question

I've used Nginx docs and set access log format. https://docs.nginx.com/nginx/admin-guide/monitoring/logging/

access_log /var/log/nginx/access.log;
log_format compression '$remote_addr - $remote_user [$time_local] '
                       '"$request" $status $body_bytes_sent '
                       '"$http_referer" "$http_user_agent" "$gzip_ratio"';

When I access the site using Firefox I get the following log:

192.168.xx.xxx - - [13/Apr/2021:14:52:16 +0200] "GET /home HTTP/1.1" 200 21408 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0"

But when I access the site using Chrome or Opera I get following logs:

Opera:

192.168.xx.xxx - - [13/Apr/2021:14:53:19 +0200] "GET /me HTTP/1.1" 200 24062 "https://my-site.com/me" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36 OPR/64.0.3417.92"

Chrome:

192.168.xx.xxx - - [13/Apr/2021:15:06:56 +0200] "GET /me HTTP/1.1" 200 115426 "https://my-site.com/me" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.114 Safari/537.36"

Did I properly set my Nginx logging configuration?