您可能需要将此添加到 /blocks/yourblockname/block_yourblockname.php 中的 class block_yourblockname

You might need to add this to class block_yourblockname in /blocks/yourblockname/block_yourblockname.php

function applicable_formats() {
    return array('all' => true);
}

适用格式限制块，因此它只出现在某些页面上.

Applicable formats restricts the block so it only appears on certain pages.

https://docs.moodle.org/dev/Blocks#Authorized_Personnel_Only