Nowadays, the Mikrotik CRS switch product pages do include performance reports. See for example
https://mikrotik.com/product/crs326_24g ... estresults
Those reports don't include latency figures, though. Just non-blocking throughput/capacity.
Latency might also vary much between different ports/port-groups (cf. the block diagram, e.g.
https://i.mt.lv/cdn/product_files/CRS32 ... 200427.png) and on the traffic currently switches on other ports.
But still, it would be helpful if Mikrotik would also publish some latency test results.
It's probably safe to say that most switches are configured for store-and-forward, by default. And that cut-through switching is a premium feature. Thus, if a switch supports it, it's usually explicitly pointed out by the vendor in the technical specification. So since Mikrotik doesn't document store-forward/cut-through configuration settings anywhere (as of 2021), it's likely that no available Mikrotik device currently supports it.
You could hunt down the datasheet for the switch's packet processor CPU (e.g. Marvell 98DX3236 for CRS326) to see if it even could support cut-through switching, but even if it did, Mikrotik might still decide to not expose it for various reasons.
It probably doesn't hurt to e-mail the Mikrotik support to inquire about any future-plans for offering cut-through switching.
Regarding 1 GBit vs. 10 GBit latency - even if you don't need the 10 GBit line-rate, 10 GBit ethernet still offers better latency than 1 GBit ethernet, because both use single-lane transmission and higher speed reduces (de-)serialization time. Similar argument can be made for 25 GBit vs 10 GBit with respect to host-to-host latency.