SXT Lite cannot be configured to be an access point. It is a CPE (client) device only
Have you looked at the manual?

/interface ethernet set 0 name=ether_if
/interface wireless set 0 name=wi-fi_if

/ip address set [/ip address find interface=ether_if] address=192.168.100.150/24

/interface wireless security-profiles set [ find default=yes ] mode=static-keys-required static-algo-0=104bit-wep static-key-0=".........................." static-transmit-key=key-0

/interface wireless set 0 mode=ap-bridge ssid="........" wireless-protocol=802.11 band=2ghz-b channel-width=20mhz country=russia frequency-mode=regulatory-domain bridge-mode=disabled security-profile=default allow-sharedkey=yes default-authentication=no default-forwarding=no hide-ssid=yes max-station-count=20

/interface wireless access-list add mac-address=00:00:00:00:00:00 authentication=no forwarding=no interface=all
/interface wireless access-list add mac-address=................ authentication=yes forwarding=no interface=all place-before=0
/interface wireless access-list add mac-address=................ authentication=yes forwarding=no interface=all place-before=0

/interface bridge remove [/interface bridge find]
/interface bridge add name=bridge_if
/interface bridge port add bridge=bridge_if interface=ether_if edge=yes
/interface bridge port add bridge=bridge_if interface=wi-fi_if edge=yes

I found that in this case there are two firewalls:
1) /interface bridge filter
2) /ip firewall filter

Tell me please, what the difference between them?
It's really two different independent firewalls or the two interfaces to the same firewall?
If they are two different firewalls, whether there can be problems with the simultaneous operation of both?

I found that in this case there are two firewalls:
1) /interface bridge filter
2) /ip firewall filter

Tell me please, what the difference between them?
It's really two different independent firewalls or the two interfaces to the same firewall?
If they are two different firewalls, whether there can be problems with the simultaneous operation of both?

I found that in this case there are two firewalls:
1) /interface bridge filter
2) /ip firewall filter

Tell me please, what the difference between them?
It's really two different independent firewalls or the two interfaces to the same firewall?
If they are two different firewalls, whether there can be problems with the simultaneous operation of both?

these are two independent things. However, you can set bridge to pass through ip firewall by setting appropriate settings. see wiki.mikrotik.com for more details.