The snmpwalk is only the base OIDs. For a further investigation you need to fetch the OID under iso.3.6.1.4.1.3854
If you do the snmpwalk like this snmpwalk -v2c -c public <IP> iso.3.6.1.4.1.3854 it should show some data.
The included checks cannot find anything as they check the OID iso.3.6.1.2.1.1.2.0 starts with
iso.3.6.1.4.1.3854.1 in your case it starts only with iso.3.6.1.4.1.3854
The 1 at the end is missing.
All the AKCP checks looking for data under
.1.3.6.1.4.1.3854.1.2.2
or
.1.3.6.1.4.1.3854.2.3
Is your device giving data there?
If i read the Icinga check correctly then is looking for data under .1.3.6.1.4.1.3854.3.5
That would mean some new or adopted plugins are needed.