I am using RouterOS 3.25 on an X86 box with 3.25 and able to arp ping using this command.
/ping 10.30.0.253 interface=ether4 arp-ping=yes
and get back response
10.30.0.253 with hw-addr 00:0C:42:07:2A:5B ping time<1 ms
The link to the wiki you posted is for the older version of RouterOS.
They do not seem to have explanation of new ping up on Wiki yet.
RouterOS CLI has TAB completion. Hit TAB twice to get a list of options for a command. Example.
/ping 10.30.0.253 TAB TAB
>
> arp-ping do-not-fragment interval size ttl
> count interface routing-table src-address
If you want to know more about what a command does you can use the ?.
> ```text
/ping 10.30.0.253 ?
Send ICMP Echo packets. Repeat after given time interval.
-- IP address
arp-ping --
count -- Number of packets
do-not-fragment -- Do not fragment ping packets
interface --
interval -- Delay between messages
routing-table --
size -- Packet size
src-address -- Source IP address to use when pinging
ttl -- Time to live