There would be no point in having B-1 and B-2 were there no difference between them. Strictly speaking I believe you are supposed to apply for a B-2 visa if you (a) have left USA since visiting on your B-1 visa, (b) you wish to revisit but for tourism and similar purposes and (c) your circumstances have not meanwhile materially changed.
However, there may be some common sense in all this. It seems your visa qualifies you to return on business (quite a broad category*
) and having had that reason before it may not be difficult for you to find a further such requirement. The point being, that you arrive with the intention of doing some business.
Once there:
You do not need to apply to change your nonimmigrant status if you were admitted into the United States for business reasons (B-1 visa category) and you wish to remain in the United States for pleasure before your authorized stay expires.
*
UCIS.
That last entry looks promising.
Credit:stackoverflow.com‘
4 Mar, 2024
4 Mar, 2024