  This study undertakes a reconsideration of the potential for a first-order
electroweak phase transition, focusing on the next-to-minimal two Higgs doublet
model (N2HDM). Our exploration spans diverse parameter spaces associated with
the phase transition, with a particular emphasis on examining the generation of
stochastic Gravitational Waves (GW) resulting from this transition. The
obtained results are meticulously compared against data from prominent
gravitational wave observatories, and the possibility of their detection in the
future GW observations have been established. In passing by we analyse the
strength of the phase transition through the production of entropy during the
electroweak phase transition.
