No. Manjaro does not support Secure Boot by default. It is possible to roll-your-own but that would require you to do your own research; basically, do it yourself.
There is a guide somewhere on the forum that explains one possible way to achieve it. I’ll post a link as soon as I find it. The guide is written by @linux-aarhus .
Perhaps it’s best not to rely on ChatGPT for serious information.
You might find the following article of interest considering that you wish to multiboot Manjaro and Windows:
Regards.