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Can there be a forced move and a brilliant move at the same time...?

Depends what you mean by "forced." If you mean it's the only legal move, then of course not because there was no choice, unless you consider not resigning (or offering a draw) a brilliant move. If by "forced" you mean that it is the only winning move or only holding move, then yes because it might not be obvious just because it is forced. It is important to note, though, that despite what chess.com might have you believe, brilliant moves are subjective.
@MrPushwood said in #4:
> What's a forced move?

Moving outta double check , I guess xxx

If you're talking about zugzwan then no because it's forcing a move which leads to decisive disadvantage

So if you're lucky and you're forced to move which leads to a good move your opponent has made a mistake , so I guess the answer is yes if your opponent has blundered.

Would it be classed as brilliant , your only move , maybe by chess.con (lol little joke there)
Endgame studies (as an art form) may be said to be a whole field that's dealing with series of forced, brilliant moves, usually from both sides.

en.wikipedia.org/wiki/Endgame_study

You may well want to debate that this is a case in point, but then that would be a matter of semantics, as indicated by the other posts.
Double check mate into a mate in x moves. It can be part of a brilliant move also if it required a Queen sac. Your opponent would have had to play incompetently for this to happen though.