Keepout area (courtyard) around ICs for hand soldering
Seems like you've done due diligence in your reviews.

Maybe place the bypass capacitors at 2mm since simulation suggests it will be ok, but make sure the routing supports manual placement at 0.5mm. This might require scraping soldermask. If the prototypes show performance is impacted, you've got room to adjust and test.

At some point you run into limitations of what the models can predict, especially with RF and radar systems, and it becomes more economical to try it out on a prototype. (Obviously build and test a small prototype run before ramping up production.)