Note: many of these resources mention COVID-19, but the information provided can be applied to any stressful circumstance.
https://www.mindful.org/when-parenting-gets-tough/
https://childmind.org/article/mindful-parenting-2/
https://www.parents.com/health/healthy-happy-kids/why-and-how-to-teach-kids-mindfulness/
https://www.zerotothree.org/resources/2268-mindfulness-for-parents
https://www.helpguide.org/articles/stress/quick-stress-relief.htm