That depends on who you mean by "they". BO is planning on landing the whole first stage, like SpaceX. BO has some experience doing stuff in that arena with their New Glenn rocket (there are a number of factors that make the New Glenn landings a lot easier than the Falcon 9 landings, but it's still very useful experience).
The BE-4 will also be used by ULA, on their Vulcan rocket. ULA has talked about detaching the engines from the first stage of the rocket and having them fall under parachutes (to be caught be a helicopter). It remains to be seen if they ever implement that (it kinda feels like a token nod to reuse to get people to stop asking question).
The BE-4 will also be used by ULA, on their Vulcan rocket. ULA has talked about detaching the engines from the first stage of the rocket and having them fall under parachutes (to be caught be a helicopter). It remains to be seen if they ever implement that (it kinda feels like a token nod to reuse to get people to stop asking question).