TPMs are becoming ubiquitous in new computers, especially with fTPM, so this might be worth it.
Kernel docs indicate rng-tools is the best way to make use of trng entropy (writes from /dev/hwrng to /dev/random)
docs.kernel.org/admin-guide/hw_random.html
Seems to be the currently most popular package:
Considerations to test:
How does this behave with devices that do not have hardware rngs?
Does xen provide virtio-rng to guests by default?