Help: No LTE ONLY option in Network Mode

I only got LTE/3G/2g (auto connect) function, 3G only and 2G only in the network mode selection
Is there a package that I can just flash or any workaround? the "*0011# " code doesnt work
the app 4G/LTE Switcher is working but it still no LTE ONLY option in the Network mode.
I was planning to set LTE only in sim slot 2.
I am rooted. TIA

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