It gives CPU, Memory, Leases, Disk etc.

What it doesn't give is in/out on an interface. I get this via snmp:

in OiD
1.3.6.1.2.1.2.2.1.10.6 where .6 is the interface number
out OiD
1.3.6.1.2.1.2.2.1.16.6 where .6 is the interface number

sensor:
# read the Bytes in/out on an interface in an interval
  - platform: snmp
    name: asa5512x1_wan6_in
    host: 10.10.10.1
    community: dom
    baseoid: 1.3.6.1.2.1.2.2.1.10.6
    accept_errors: true
    version: 2c
    scan_interval: 20
  - platform: snmp
    name: asa5512x1_wan6_out
    host: 10.10.10.1
    community: dom
    baseoid: 1.3.6.1.2.1.2.2.1.16.6
    accept_errors: true
    version: 2c
    scan_interval: 20
# calculate the gradiant of the bandwith of the asa5512x
  - platform: derivative
    source: sensor.asa5512x1_wan6_in
    unit_time: s
    unit: B
    name: asa5512x1_wan6_in_der 
  - platform: derivative
    source: sensor.asa5512x1_wan6_out
    unit_time: s
    unit: B
    name: asa5512x1_wan6_out_der 
# calculate MBps and MiB between intervals of the asa5512x
  - platform: template
    sensors:
      asa5512x1_wan6_in_mbps:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_in_der')|float*8/1000000)|round(2) }}"
        unit_of_measurement: 'Mbps'
        friendly_name: Internet in Mbps
      asa5512x1_wan6_out_mbps:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_out_der')|float*8/1000000)|round(2) }}"
        unit_of_measurement: 'Mbps'
        friendly_name: Internet out Mbps
      asa5512x1_wan6_in_mib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_in')|float/1000000)|round(2) }}"
        unit_of_measurement: 'MiB'
        friendly_name: Internet in MiB
      asa5512x1_wan6_out_mib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_out')|float/1000000)|round(2) }}"
        unit_of_measurement: 'MiB'
        friendly_name: Internet out MiB
      asa5512x1_wan6_in_gib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_in')|float/1000000000)|round(2) }}"
        unit_of_measurement: 'GiB'
        friendly_name: Internet in GiB
      asa5512x1_wan6_out_gib:
        value_template:  "{{ (states('sensor.asa5512x1_wan6_out')|float/1000000000)|round(2) }}"
        unit_of_measurement: 'GiB'
        friendly_name: Internet out GiB

And for the totals (day/month):

utility_meter:
# asa5512x1 wan usage
  asa5512x1_wan6_in_gib_monthly:
    source: sensor.asa5512x1_wan6_in_gib
    cycle: monthly
    name: Internet in monthly
  asa5512x1_wan6_in_gib_daily:
    source: sensor.asa5512x1_wan6_in_gib
    cycle: daily
    name: Internet in daily
  asa5512x1_wan6_out_gib_monthly:
    source: sensor.asa5512x1_wan6_out_gib
    cycle: monthly
    name: Internet out monthly
  asa5512x1_wan6_out_gib_daily:
    source: sensor.asa5512x1_wan6_out_gib
    cycle: daily
    name: Internet out daily

is their any commands i can run in pfsense to obtain OID details

You could just do a snmpwalk this would list out everything..

This might be helpful
https://www.youtube.com/watch?v=CKPbIeiJ2AQ
Monitoring pfSense 2.4 with SNMP