Catchall email android app - sender should be receiver account

I am using catchall email adresses with my own domain.
For several purposes I have several adresses, p.ex. frdoid@mydomain.com, spam@mydomain.com, ebay@mydomain.com etc.
With thunderbird on Desktop, there is no issue. It chooses automatically the email adress the mail was sent to (p.ex. fdroid@mydomain.com) and uses it as the sender email.

Example: So if info@frdoid.com sends me an email to fdroid@mydomain.com and I want to answer, thunderbird will send the email from fdroid@mydomain.com. I never added fdroid@mydomain.com as a separate email account in thunderbird, I only set up catchall@mydomain.com.
The sender email fdroid@mydomain.com is automatically created as a sender address once a mail to a address abc(or whatever)@mydomain.com is received

I am now looking for an email client on android doing the same.

Did you try the obvious #1 choice? K9 mail. There is not much choice besides that anyway… quite a number of alternatives that are slightly better on one aspect or another but overall K9 mail is just doing most things right and still improving.

I am using FairEmail von K9 mail for quite some time, but they do not have that feature.

I am using a very similar setup in K9 and it works. For the account that receives the email you need to add all identities, that is in account settings, sending email, manage identities.