The only minor concern is sharing the ducting with the electricity. You wouldn't want the situation where someone chops through and somehow it makes the ethernet cable live, hopefully someone on here can answer that for you, but if it was me I would be tempted to run it separate.
And there was me thinking that Ethernet had isolation transformers on all ports (Ok SFP/SFP+/QSFP28 and QSFP28+ excepted but not remotely relevant here) for this very reason that is embedded into the standard. You could switch to SWA Cat6a if you want extra protection.
TL;DR if your ethernet device get's fried because mains was applied to it then it is a defective design and you have a right to all your money back
Had a lightning surge in summer 2019 that blew apart the (earthed) Ubiquiti surge arrestors on several external UTP links, took out network switches, actually spot welded two together. Nuked or severely damaged various things all via their data ports. Even the fibre ONT didn't escape unscathed.
I was always schooled against running copper data cabling between buildings, but it was a case lesson in how destructive nature can be. We lost thousands of pounds in gear that day.
Log tendrils of either power or data cabling externally are like antenna, that come alive in an equipotential. disaster.