You're saying you have L1 but still on oos11? If so, oos11 (184.108.40.206) L1 has never been a problem with unlocked bootloader, but thanks for sharing for others. People on oos13 and custom roms seem to be hit and missI got L1 with unlocked bootloader and Magisk.
I have LE2110. I used MSM tool (Global) to get back to OOS 11. It locked the bootloader; it always does. So I set up the phone offline (without connecting to WiFi or Mobile Data). Then I upgraded to OOS 220.127.116.11 version through local upgrade. Then opened Developer Options for OEM Unlocking. The option was greyed out and it asked to connect to internet. So I connected my WiFi for a minute or two until that OEM Unlocking was available. I enabled it, and disconnected WiFI. I DID NOT login to my Google account or opened Play Store. I rebooted to fastboot, and unlocked bootloader. Then rebooted. Then did the initial setup again (without connecting to WiFi or Mobile Data). Then I turned off and got the boot.img through MSM tool's readback option. (I was on slot_b so I got boot_b from MSM). Patched this boot.img with Magisk. Booted it temporarily and then through Magisk app, gainded permanent root by Direct Install. Rebooted. Enabled Zygisk from Magisk and Enforce Denylist, and rebooted again. Installed Universal SafetyNet Fix through Magisk and rebooted again. Opened Magisk and hid the Magisk app (just named it Settings; it installed and then showed root lost, but I just closed the app, and reopened new hidden Magisk again). Rebooted. Then I went ahead and connected to WiFi, logged in to my Google account and stuff. Checked from YASNAC and DRM Info and found that Safety Net passed as well as got L1.
I did not put any Google related app to Denylist.