ER-6P supported SFPs - TL-SM321B?

Any recommended SFP modules known to work with ER-6P?

I tried with a TP-Link TL-SM321B, and couldn't figure out how to make it work - any advice? It seems generally supported, e.g. on OpenWrt on Turris Omnia since 2019ish, also on Turris Omnia itself. What would it take to use it on ER-6P?

On my OpenWrt SNAPSHOT r21171-46fbe55971 install (kernel 5.10.152), the SFP module seems to be detected, but dmesg lacks any other details, and ethtool errors out on any use of it, so it doesn't seem to supported ("supports-eeprom-access: no").

Is SFP on ER-6P fully functional?

# dmesg | grep sfp
[   19.909527] sfp sfp: Host maximum power 1.0W
[   19.913880] sfp sfp: No tx_disable pin: SFP modules will always be emitting.
[   20.232529] sfp sfp: module TP-Link          TL-SM321B(UN)    rev 3.0  sn 22241P5000640    dc 220423  

# ethtool -m lan5
Cannot get module EEPROM information: Not supported

# ethtool lan5
netlink error: failed to retrieve link settings
netlink error: No such device
netlink error: failed to retrieve link settings
netlink error: No such device
Settings for lan5:
	Link detected: no

# ethtool -i lan5
driver: octeon_ethernet
version: 5.10.152
firmware-version: 
expansion-rom-version: 
bus-info: Builtin
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no