sos, image looks great in lightroom and in preview but when i upload to anywhere its low quality!

Yoiur screenshots from Photoshop, preview, and Lightroom Cloudy show that you are not scaling down your image but are trying to feed these social media apps your full resolution file. There are a few things to realize. When your images go to instagram or facebook, they scale down your images and do so extremely badly. instagram has a maximum size of 1080 pixels wide. For vertical images the maximum tallnes is 1350 pixels. If you post on instagram, the best thing to do is to crop to one of the standard aspact ratios there (typically 1x1) and export to 1080 pixels wide. Also make sure to select about a quality of 85 (DO NOT FEED IT QUALITY 100 as it will trigger a bad recompression), and to select output sharpening for screen of medium or high. That should give you optimal quality there. You can't get instagram images to look much better than that. Facebook can take somewhat larger sizes but their scaling algorithm is horrid, so you are again best of not giving it too large an image nor one at a too high quality setting. Again scale down to a size of about 1500 to 1800 pixels on the long side and make sure to employ output sharpening. For both these apps if you give it your highest quality and size image they will absolutely wreck it so best to scale down and compress a bit yourself so which avoids the apps overly damaging your images.

What is the size (in pixels, not inches or megabytes) of the exported photo that you are trying to use on Wix or social media?

Show your settings in the export panel in Lightroom Classic. Make sure you export to large enough resolution. Typically around 2000 pixels on the long end is what you want. Also make sure to set the quality to 85% or higher, and to use the sRGB color space.