The color and consistency of mucus can change during the menstrual cycle, depending on hormone levels. On day 21 of the cycle (if the cycle lasts about 28 days) there is a luteal phase, which follows ovulation and lasts until the start of menstruation. During this phase, the mucus usually becomes more dense, sticky and opaque. It can be white, cream or yellowish in color.

Keep in mind that every body is different, so your mucus may be different from the standard one I described above. This is normal and not a cause for concern. It is important to observe your cycle for several months to better understand it and observe its individual characteristics.

I have attached helpful materials:

https://www.gdziepolek.pl/kategorie/seks-i-zdrowie-intymne