more_set_input_headers does not take effect

server {
listen 80;
listen [::]:80;
server_name localhost;

#access_log  /var/log/nginx/host.access.log  main;
location / {
    more_set_input_headers 'Host: mybo';
    
    root   /usr/share/nginx/html;
    index  index.html index.htm;
}
#error_page  404              /404.html;

# redirect server error pages to the static page /50x.html
#
error_page   500 502 503 504  /50x.html;
location = /50x.html {
    root   /usr/share/nginx/html;
}

# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
#    proxy_pass   http://127.0.0.1;
#}

# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
#    root           html;
#    fastcgi_pass   127.0.0.1:9000;
#    fastcgi_index  index.php;
#    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
#    include        fastcgi_params;
#}

# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
#    deny  all;
#}

}

curl -v http://127.0.0.1:8088/

• Trying 127.0.0.1:8088...
• Connected to 127.0.0.1 (127.0.0.1) port 8088

GET / HTTP/1.1
Host: 127.0.0.1:8088
User-Agent: curl/8.4.0
Accept: /

Start by reproducing the supplied NGINX server configuration and curl request, focusing on the more_set_input_headers directive in the location block. Trace how that directive is applied to the request and verify whether the configured Host value reaches the request; done requires a confirmed fix or a documented limitation.