Yes, but not “out of the box” with OEM stuff as Glyn says. You could connect multiple pulse counters to a Raspberry Pi directly (not an emonPi), it’s been a long time since I studied the GPIO on a Pi, but if you could free up 20-25 pins it would be fairly straightforward, I think 20-25 is pushing it for one Pi but I think 2 Pi’s (even 2 zero WiFi’s) would easily be ample. You might be able to use an IO expander to keep it on one Pi, but I’m not familiar with using them.
Here’s a post where I have connected 2 optical pulse counters to one Pi, but the code is scale-able and there was plenty of GPIO pins left over. (see Directly connecting to Optical Pulse Counter with RPi? - #2 by pb66)