Hi @garblaster ,
You can fix this by removing the Component from the PowerApps for the specific form,
Please Refer to the screenshot below,

Below will be the output for the same,

As an alternative approach you can also try to change the Modify the CSS of the Field for the specific form,
Navigate to the Power Pages Management > Under the content > Basic forms > Select form > Additional Settings > Custom Scripts,
Paste the below code snippet :
$(document).ready(() => {
$("td:has(.checkbox)").find(".control").css("margin-left", '30px');
})
Please refer to the screenshot given below,

Below will be the output for the same,

Thanks!