$ tpm2_testparms rsa2048
$ gpg --edit-key 6ED87427C830FB1D06AF5383700CBA7FFF688DBF
gpg (GnuPG) 2.4.3; Copyright (C) 2023 g10 Code GmbH
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Secret key is available.

gpg: checking the trustdb
gpg: marginals needed: 3  completes needed: 1  trust model: pgp
gpg: depth: 0  valid:   5  signed:   0  trust: 0-, 0q, 0n, 0m, 0f, 5u
gpg: next trustdb check due at 2026-08-06
sec  rsa2048/700CBA7FFF688DBF
     created: 2023-08-08  expires: 2026-08-07  usage: SC  
     trust: ultimate      validity: ultimate
[ultimate] (1). Test Test4 <test@test.com>

gpg> keytotpm
Really move the primary key? (y/N) y

sec  rsa2048/700CBA7FFF688DBF
     created: 2023-08-08  expires: 2026-08-07  usage: SC  
     trust: ultimate      validity: ultimate
[ultimate] (1). Test Test4 <test@test.com>

gpg> save
Key not changed so no update needed.