If you do not already own a catchall you can get one from Google Domains for around 12$/y (you do not need Google Workspace), there might be other cheaper providers out there tho
My Domains Sections
After purchasing a domain, click on Manage, then click on Email
Email Section
Click on Add email alias, then put an* in Alias email, and the email address where you want the emails to get redirect to in Existing recipient email ("destination" address)
Add Email Alias
After adding it, whenever you send an email to any address of your domain, it'll get redirected to your "destination" address
