There are a number of solutions that may work for you.
Phonak has a ‘phone’ mode for landline phones that takes the signal going in one aid and splitting it between both sides so you can hear the caller in both ears which can be a great help.
Telecoil is most likely built into your aids as the VA tends to go top level with what they provide.
Both of these options would need to be enabled by your audiologist.
The aids should work with any Bluetooth phone that uses the Hands Free Profile. See: https://product-support.phonak.com/s/article/Connecting-Phonak-hearing-aids-to-a-Bluetooth-landline-phone?language=en_US
The last option that I am aware of is that Phonak sells a landline cordless phone the Phonak DECT that should solve your problem:
Hope this helps you find a solution.
Jim