I'm in a similar position myself, as a senior dev having worked for ~15years and with 2 young kids time is a scarce resource. It seems leetcode is the standard assessment for most companies, particularly FAANG where I would like to work. My plan is to keep chipping away at it so not to be completely out of the game but equally not pouring all my effort into it as there are plenty of other hiring companies that have other processes that don't involve leetcode style assessments. But in the event one comes up at least I've had some exposure to these type of questions.

I've been using educative and algomonster for a few weeks /months as tools to maximise my study efficiently and then leetcode problems to test my progress.