Hah I'm in exactly the same boat. I'm slower for sure at standalone 5ks-10ks, but I think because of a combo of better training methods (finally found a plan that I like-works for me well), better sleep (CPAP!), kids finally kinda independent = more training time, and finally having enough time to go to the pool, I'm overall faster.

Weirdly, despite my slower standalone 5k-10k times, I've been running my lifetime fastest times for Oly tris (haven't done long stuff in the past few years). Makes me really think that the impact of swim fitness and bike fitness on the run continues to be hugely understated, especially the swim. In a few races where I had disappointingly slow swim times for my pool fitness (not sure what happened, could be cold water effects on me?) I suspect the saved energy from the under-effort swim let me outperform on the bike and especially the run. My local racing buddy who does very similar training to me (we track closely on Strava) just ran a 2:48 marathon, and has an averaget training pace 40-60 seconds faster than mine on Strava, yet come race day I on ran 8 sec/mile slower than him in the same race where he ran as he expected. I did swim a LOT more than he did (he did minimal swimming) and I think I'm just a naturally faster biker so probably cost me less on the bike.