How to go about creating multiple email alias to direct to my custom domain on proton

I have recently made the switch to proton mail and have purchased the proton mail plus plan so I can have my custom domain linked to proton. Now I want to create alias' for every service that I use to better manage any spam or annoying emails. I looked at simplelogin and it seems I have to pay to create unlimited alias with them. Is there any way to do this for free in either proton mail or simplelogin with …

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