Your store is indexed. Etsy only shows the top 15,600 results for any search term, and results are customized so everyone sees something different, depending on their previous search and buying history.
Start by reading the Etsy Seller Handbook section on How Search works and especially how to formulate your titles and tags.
One of your titles: Orange and Cranberry explosive fruity burst of aroma vegan friendly soy wax smelling candles 12 hours lasting UK Made handcrafted valentines (140 characters). Search engines now like titles that are about 50 to 80 characters long, including spaces and punctuation. Too long or too short won't rank as high, all other factors being equal.
The first 30 characters of your title should say WHAT you are selling. You are not selling Orange and Cranberry explosive fruity burst of aroma. You are selling a Vegan Soy Candle, so that should be first. One or two keyword phrases for the search engine is enough. Use the 2nd half of your title to tell the customer something more they might want to know about your product, such as size, smell, color, etc. Save the poetic flowery language for your description. Customers are more likely to click on shorter titles that get to the point quickly.
Titles should sound more like a partial sentence than a long list of keywords. Customers will be more likely to read and click on your title if you get to the point.
The first sentence or two of your description should use some keyword phrases someone would type into a search engine to find a product like yours, while describing your product and talking about the benefits of owning such a product.
In your description you say this product does NOT ship to the US, but in your postage section, you say it does. Which is it? US buyers are more than 25% of all buyers on Etsy, so if you don't ship here, you are cutting out a big part of your market. If you do ship here, give weights in both grams and ounces because most people here have no idea how big a gram is. They might also want to know the size of the jar in inches and cms.
While there is no penalty for repeating words in your tags, it is a waste of space to do so. The Etsy search will pull words from 2 or more tags to match what was searched for, so a tag doesn't even have to be a keyword phrase as long as you can make one by combining words in 2 or more tags. You are allowed 13 tags and each tag can be a maximum of 20 characters, so you should try to fill each tag as full as you can. A tag should never be a single word.
You are in the UK, so your return policy is illegal. You must meet 3 requirements: 1)You must give 14 days to notify of a return and another 14 days to return it. On Etsy, the closest option is 30 days. 2)You must have a GDPR Privacy Policy posted in your store. and 3)You must show your physical address and an email address to contact you in your About section. If any of those three are missing, your return policy is voided and replaced with they now have a year and a day to request a refund and they don't even have to return the merchandise.
