When running nginx on Buster with the TLS terminator config I can see the following error:
Jul 23 07:43:34 analytics-tool1004 systemd[1]: Starting A high performance web server and a reverse proxy server... Jul 23 07:43:34 analytics-tool1004 nginx[27274]: nginx: [emerg] unknown directive "ssl_dyn_rec_enable" in /etc/nginx/nginx.conf:53 Jul 23 07:43:34 analytics-tool1004 nginx[27274]: nginx: configuration file /etc/nginx/nginx.conf test failed
elukey@analytics-tool1004:~$ sudo apt-cache policy nginx-full nginx-full: Installed: 1.14.2-2 Candidate: 1.14.2-2 Version table: *** 1.14.2-2 500 500 http://mirrors.wikimedia.org/debian buster/main amd64 Packages 100 /var/lib/dpkg/status
There is still no wmf version of the nginx-full package for buster-wikimedia. In this case, the bit needed should be https://github.com/wikimedia/operations-software-nginx/blob/master/debian/patches/0100-dynamic-tls-records.patch