Hello!
You have a nice store 
Here are some suggestions that can improve the website:
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consider selecting different italic font (for the “Mission, Vision, Values” block). It’s not bad, but maybe something a little more readable
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try moving the footer slider upper. You can use it to showcase new product, sales or just turn it into “fast navigate” block
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add some description to the page title - now it says just “marvybeauty”. You can add something like " - beauty products" or something related to your store. It will boost the store seo a little bit. It’s better to use some keywords in title. Let me know if you need more info on this point.
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consider turning the FAQ page into another page type - it will improve the readability. Now all questions and answers are shown as something solid and single, without visual dividers. It’s pretty hard to read such texts (or to find something that you’re looking for)
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do you really need that many countries in the currency selector?
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try to make the font size for the product description a little bigger - it will improve readability as well.
As for growing TikTok and instagram - what strategies have you tried already?