This is a work in several stages, but I will try to be as simple as possible, I will take into account that you know a little about PHP, if you don’t, you can answer me here, that I try to help you.
Go to the following file:
buddymeet / includes / buddymeet-functions.php
Line 129
?????? ‘domain’ => ‘meet.jit.si’,
change to your domain
Now go to the file in the same folder called buddymeet-group-class.php
In line 163 create a div with the property display: none will be as follows your code
<strong><div style="display: none"></strong>
<div class="field-group">
<div class="checkbox">
<label><input type="checkbox" name="buddymeet_enabled" value="1" <?php checked( (bool) $enabled )?>> <?php _e( 'Activate', 'buddymeet' ); ?></label>
</div>
</div>
<?php if(in_array('domain', $display_settings)): ?>
<div class="field-group">
<label><?php _e( 'Domain', 'buddymeet' ); ?></label>
<input type="text" name="buddymeet_domain" id="buddymeet_domain" value="<?php esc_attr_e($domain); ?>"/>
<p class="description"><?php esc_html_e( 'The domain the Jitsi Meet server runs. Defaults to their free hosted service.', 'buddymeet' ); ?></p>
</div>
<?php endif; ?>
<?php if(in_array('room', $display_settings)): ?>
<div class="field-group">
<label><?php _e( 'Room', 'buddymeet' ); ?></label>
<input type="text" name="buddymeet_room" id="buddymeet_room" value="<?php esc_attr_e($room); ?>"/>
<p class="description"><?php esc_html_e( 'Set the room group members will enter automatically when visiting the ' .buddymeet_get_name(). ' menu.', 'buddymeet' ); ?></p>
</div>
<?php else: ?>
<input type="hidden" name="buddymeet_room" value="<?php esc_attr_e($room); ?>"/>
<?php endif; ?>
<strong></div></strong>
The parts in bold are the changes we made, basically we don’t allow the server and room options to appear