A workaround solution: One-click installation of a conversion tool to convert HEIC files to PNG (tested and proven convenient): GitHub - xRyul/obsidian-image-converter: ⚡️ Convert, compress, resize, annotate, markup, draw, crop, rotate, flip, align images directly in Obsidian. Drag-resize, rename with variables, batch process. WEBP, JPG, PNG, HEIC, TIF. · GitHub
Direct solution, but manual installation required (not tested): GitHub - guoang/obsidian-heic-preview: Obsidian plugin for HEIC image preview on macOS using native sips conversion · GitHub