This is how I simply download my SVG UIImage from url:

import SDWebImageSVGCoder
import SDWebImage

extension UIImageView {
    func setImage(with url: URL, grayScale: Bool = false) {
        downloadImage(with: url) { [weak self] image in
            self?.image = (grayScale ? image?.grayScale : image)
        }
    }

    func downloadImage(with url: URL, completion: @escaping ImageHandler) {
            sd_setImage(
                with: url,
                placeholderImage: nil,
                options: [.allowInvalidSSLCertificates, .avoidAutoSetImage],
                context: nil,
                progress: nil
            ) { image, _, _, _ in
                completion(image)
            }
    }
}

extension UIImage {

    var grayScale: UIImage? {
        let context = CIContext(options: nil)
        guard let currentFilter = CIFilter(name: "CIPhotoEffectMono") else {
            return nil
        }
        currentFilter.setValue(CIImage(image: self), forKey: kCIInputImageKey) //CIImage(image: self) is nil, why?
        if let output = currentFilter.outputImage,
           let cgImage = context.createCGImage(output, from: output.extent) {
            return UIImage(cgImage: cgImage, scale: scale, orientation: imageOrientation)
        }
        return nil
    }

}

For every image type (jpeg, png, etc) it simply generates grayScale except of this one (svg). Why?

Also in AppDelegate I set:

let SVGCoder = SDImageSVGCoder.shared
SDImageCodersManager.shared.addCoder(SVGCoder)