hostname support in geo (ngx_http_geo_module) variable maps?

[PGNet Dev]

i'm running nginx/1.23.1

i use 'geo'-based (ngx_http_geo_module) permissions to restrict access to some 
sites
e.g., for explicit static IPs

        geo $RESTRICT_ACCESS {
                default          0;
                127.0.0.1/32     1;
                2601:...:abcd    1;
        }

        server {
                ...
                if ($RESTRICT_ACCESS = 0) { return 403;}

it works as intended.

i'd like to add access for a couple of hosts with dynamic IPs.
the IPs *are* tracked, and updated to DNS.

e.g., both A & AAAA records exist, and are automatically updated on change, at

        mydynamicIP.example.com

so that, in effect,

        geo $RESTRICT_ACCESS {
                default          0;
                127.0.0.1/32     1;
                2601:...:abcd    1;
                <IPv4 addr for mydynamicIP.example.com> 1;
                <IPv6 addr for mydynamicIP.example.com> 1;
        }

at wiki, there is mention of

        "ngx_http_rdns_module"
         https://www.nginx.com/resources/wiki/modules/rdns/

which points to

        https://github.com/flant/nginx-http-rdns

but, there

        "Disclaimer (February, 2022)
         This module hasn't been maintained by its original developers for years 
already."

is there a recommended/current method for using *hostnames* in geo?  ideally, 
without lua.
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