‘Floating the pitch’ is quite a normal practice in commercial settings amongst tuners I work with and for.
If it’s a concert / studio / then you can assume A440 unless told otherwise. But ‘if it’s sharp leave it sharp’ is perfectly acceptable for most situations, anywhere from A440 to A443 as MilanDka says (442 is usually the highest in my tuning round)
It takes a bit of experience to assess the piano before tuning and deciding on the right pitch.
Optimise pitch feature can help with this, but also factor in where each section of the piano is in relation to a target pitch (the bass section is quicker to pitch correct than the middle for example so if that has skewed the optimise pitch measurement you may want to amend manually).
From the tuners perspective if you are fine tuning within that range you can achieve a more stable tuning by leaving it sharp rather than pitch correcting all the way to A440, and if the humidity drops then it will hopefully stay above a440 long after you’ve tuned the piano. 🤞 🌦️