... and the actual circuit
Maybe start an ADR1001 thread? For that eval,
LTM8048 DC-DC converter module 1cm away from the reference IC? Really? I would say there will be an EMI problem. It's variable freq. flyback and I'd guess under 100kHz with no datasheet info about the isolation capacitance. There are these things called ferrite beads, CM chokes necessary but even then, the 20 pin LCC package is not great despite the high price.
Most of us would like something that performs to its best, over being small and cute with extra marketing. What's wrong with Club TO-99? Great package. It solders better than a through-hole SMA lol.