Boot Time Entropy Starvation

How does QubesOS/Xen address issues like boot time entropy starvation?

Which entropy collection methods does the QubesOS/Xen kernel use?

in kernel jitter entropy collector

User-space entropy collectors, such as Thorsten Glaser’s early-rng-init-tools, haveged, or others?

IIRC haveged is used
You might want to read consider installing jitterentropy-rngd to improve entropy collection · Issue #4169 · QubesOS/qubes-issues · GitHub

Are they planning on implementing Entropy Source and DRNG Manager (ESDM)?