So prefacing this, I think anyone has the capability of being featured, and these are just my recommendations towards you working towards aiming towards feature, specifically. Webtoons does have a certain way that they like doing things.
Strengths of your comic:
-Full color
-Webtoon style
-Consistent updates
-Art style that has a wide appeal
-Very good use of colors
-Takes advantage of the scroll format often for interesting shots
-Though your story is an isekai which is very popular and may work against you being chosen off of theme alone, I've never seen one about specifically slaying arachnids so you have that going for you xD
Weaknesses (with suggestions)
-Colors are often similar and bleed into each other, making it hard to read. You seem to be a fan of saturated colors, consider mixing in a decent amount of less saturated colors (mostly in the background) to let your main characters stand out. I tried to edit this panel to show what I mean, but it's kind of hard only using filters haha
-Minimal establishing shots, leading to confusion where characters are. You do a loooot of closed-in shots to establish setting, which have their place, but I think you should throw in quite a few more wide shots to show where everyone is standing in a particular setting.
-Anatomy needs improvement, even with a childish style the characters look a little strange sometimes. I can't replicate your style but here's an anatomy suggestion.
-Speech bubbles are often oddly placed, I also recommend using a font instead of handwriting since even though handwriting gives a neat effect legibility is still the #1 highest priority in a comic. I can see you want to carry the crayon-y coloring book style into the speech bubbles, but I recommend just keeping the frames and speech bubbles crisp and neat and leaving the crayon style to the art. this includes having clear panel cutoffs
-The plot setup is kind of confusing, but I don't feel like this is due to your writing, I think it's mostly because of the art and your tendency to draw closed-in shots. I felt like I never knew where the characters truly were standing or how they were positioned.
I think right now, the thing that will hold you back from obtaining feature is art quality. You have a very good style... Like... basis? You have very interesting colors, a unique way of drawing people, and stylized shots which actually make me remember your comic. But it's all kind of like... Not as good as it could be. I recommend taking 15 steps back and studying fundamentals for a while, really getting the hang of anatomy and perspective shots will do you a lot of good.