Gratitude and resilience appear to reinforce each other in a fairly direct way: people who regularly notice and record what is going well tend to recover from setbacks somewhat faster than those who do not, possibly because the practice keeps a wider, steadier perspective available even during a genuinely difficult stretch.
The mechanism seems to involve keeping a broader account open during hardship, so that a single difficult event does not become the entire story a person is telling themselves about their life at that moment. Gratitude, in this sense, functions less as denial and more as a counterweight already in place before it is needed.
This is part of why gratitude practices are increasingly built into resilience training more broadly, not as a replacement for addressing a genuine problem directly, but as a steady undercurrent that makes the harder, more direct work of coping feel less overwhelming when it eventually has to happen.