I am a psychologist. I have the following question.

So, last year I was running a study. I intended to collect at least 400 participants (it was difficult to estimate an anticipated effect size but they are usually small-to-medium in personality psychology). The study was an experiment with 6 conditions (2(me vs other) x 3(situation with 3 different levels)) and I was interested in a 3-way interaction (self_vs_other x  situation x personality trait).
My data collection got terminated midway because the Institute closed the surveymonkey account. I ended up with 236 participants. I calculated results and found what I was looking for. The interaction alone explains 4.3% of variance, is significant and is of size eta_squared =.094 which means it's somewhere between medium and large. The results are interesting.

But I am unsure about sample size. Someone might say it's too small for a study with a 3-way interaction.
Now, can I simply report a post-hoc power analysis in a paper and claim that it's ok? Or should I rather resume collection (on a different website and in a different situation: during covid pandemic...)?
Thanks a lot in advance for all your input!