As Lexel noted, for the first several months it was available, the ROT66 was shipping with NarsilM.
In Anduril, I think the strobes, like battery check mode, are only accessible from off.
Unfortunately, so far lights with Anduril are only available from Chinese sellers, as far as I’ve seen. The FW3A will hopefully start shipping in the next couple of months, and should be about $30. That will be the cheapest Anduril light I know of.
The Sofirn SP36 BLF edition has Anduril, and it looks like there are some coupons in the user negotiated deals subforum for $47.
I have seen a few posts in the Want to Sell subforum offering BLF Q8’s that have been modified with Anduril.