This guide will let you know how to get the Burning Wasp in Warframe.
Burning wasp can drop as a bounty completion reward from completing certain level bounties on Cetus/Plains of Eidolon.
The bounties you will need to look for are the bounties that are levels 10-30; you can check if the burning wasp is in the reward pool by looking at the list of rewards when you hover over the bounty. If it isn’t, you just need to wait until the rewards cycle, which you can see when they are going to cycle by looking at the top of the bounties.
It doesn’t have the lowest drop rates out of the possible items you can get from the bounty reward pool. It shouldn’t be too difficult to get the mod unless your luck isn’t great.