I think that alliances WITHOUT America with be an inevitable consequence of Trump's MAGA actions.
Defense.
UK-EU collaboration.
UK-Australia recently signed the Defence and Security Cooperation Agreement (joint operations/exercises in the Indo-Pacific region, and resource sharing)
CANZUK - Ideas around trade, defence and foreign policy, nothing definite yet.
Where this leaves other agreements that include the US such as Five Eyes and AUSCANNZUKUS (naval command and control) is anyone's guess, particularly since the incident where Trump stopped intelligence to Ukraine and ordered the UK not to share intel either. This resulted in significant military losses for Ukraine and undermined its negotiating position.
It has become increasingly clear that the US is no longer a trusted ally to many western countries.