you probably actually can. On the hobbiest side I swapped out my 2.4ghz control radio w/ 900mhz in about 10 minutes, honestly the hardest part was zip tieing it in place. In most drones the actual radios are discrete components even many of the very tiny 'tiny woop' style drones. Snap the transmitter side into my rc controller's module slot, rebind and I'm back flying.
Now I'm not sure how a switchblade goes together, but I imagine it's even easier a field expedient way to swap frequencies seems pretty useful in a situation where jammers are in play.
Can't exactly re-engineer all the RF parts in the drone and the groundstation.