If you miss your telephone handsets: There are telephone handsets as USB audio devices (USB handset, https://www.conrad.de/de/p/digitus-skype-schnurgebundener-telefonhoerer-922956.html) or you can use special USB handsfree devices.
Gigaset offers a DECT hands-free device that can be used similarly to a cordless phone. Here is a data sheet for the Gigaset ION.