Liverpool do not seem to be interested in Osimhen, which is why they never mentioned him even when they negotiate the potential transfer of Darwin Nunez to Napoli, Liverpool have not linked Osimhen with the negotiations. The striker targeted by Liverpool is Alexander Isak, and perhaps Liverpool need to wait first until Darwin Nunez is sold because signing Isak will require a high amount of money.
Liverpool's recruitment techniques are often carried out secretly without much media exposure so that Liverpool's interest in one player is rarely known. Perhaps not being interested in Osimhen is also part of Liverpool's strategy.
Recently, the media has exposed Luis Diaz to Bayern Munich after news of the potential transfer of Darwin Nunez.
Osimhen is a definite attacker when already in the opposing team's defense. Of course we are happy if Liverpool can sign Osimhen.
There are rumors that Nunez might be heading to Napoli. Nothing has been confirmed yet, but i think he’ll be leaving sometime soon either way. As you mentioned, Liverpool tends to work in secrecy, and then suddenly a great transfer happens without much warning. Osimhen seems to be everyone's target because he's an excellent striker, and i believe he would fit in anywhere.