I found the best response to standups in a prior job was to randomise a delay about ongoing work. Simply talk about what you did 2-5 days ago (depending on urgency of things). This obfuscates your exact productivity and takes away organisational power from micro-managing bosses.

Whenever a manager comes in or there is a meeting to check on your progress, you can slice of something from your buffer to present. For every problem you present (from few days) ago, you can already present the solution.

Or, in other words: Your productivity is some process that you don't want to be observed directly by your manager, because you will suffer negative consequences from them detecting the exact amplitudes. You simply apply non-stationary smoothing to it.