Be it............. or grammar [closed]

Can anyone please describe the use of "be it or " grammar, I have checked internet but couldn't find anything that me help.

with regards

It's an archaic construction, inverting the verb and the subject, and using the (nearly obsolete) subjunctive form of the verb, to convey a conditional.

It survives much more in the past (where, apart from were, the subjunctive is the same as the ordinary past). So:

Had I known ... = If I had known ...

Had he seen it, ... = If he had seen it, ...

Should you want me, ... = If you should want me, ... = If you wanted me, ...

Were I to say that, ... = If I were to say that, ... = If I said that, ...

These past forms are all somewhat literary, but occasionally used even in speech.

The following present forms are even more literary, and rarely used except to be deliberately old-fashioned:

Be he good or evil, ... = Whether he is good or evil, ...

Be it so or not, ... = Whether it is so or not, ...