I know this is awkward and i did not find any answers to my question , but i want to ask , is it ok to apply sunscreen on my lady parts (vaginal area)?

Usually : Some sunblocks may cause a burning sensation when they come in contact with mucous membranes. Zinc oxide products typically do not. Otherwise it would be a good idea if you are sunbathing in the nude.

Depends: Sunscreens are to be used for skin only. But, if you intend to use them on mucous membranes, do a small test area first to be sure there is no burning, stinging, allergies, or other side effects. Be aware that potential systemic absorption may be toxic.