Import from FooGallery?

FooGallery exports JSON in this format for a Gallery:

[
	{
		"ID": "2141",
		"template": "image-viewer",
		"name": "My Gallery Title",
		"datasource_name": "media_library",
		"attachment_ids": [
			"4172",
			"4171",
			"4173",
			"4175"
		],
		"settings": {
			"foogallery_items_view": "manage",
			"image-viewer_thumbnail_size": {
				"width": "640",
				"height": "360",
				"crop": "1"
			},
			"image-viewer_thumbnail_link": "image",
			"image-viewer_lightbox": "foobox",
			"image-viewer_alignment": "fg-center",
			"image-viewer_looping": "enabled",
			"image-viewer_theme": "fg-light",
			"image-viewer_border_size": "fg-border-thin",
			"image-viewer_rounded_corners": "",
			"image-viewer_drop_shadow": "fg-shadow-outline",
			"image-viewer_inner_shadow": "",
			"image-viewer_loading_icon": "fg-loading-default",
			"image-viewer_loaded_effect": "fg-loaded-fade-in",
			"image-viewer_foobox_caption_source": "",
			"image-viewer_hover_effect_type": "normal",
			"image-viewer_caption_invert_color": "",
			"image-viewer_hover_effect_color": "",
			"image-viewer_hover_effect_scale": "",
			"image-viewer_hover_effect_caption_visibility": "fg-caption-hover",
			"image-viewer_hover_effect_transition": "fg-hover-fade",
			"image-viewer_hover_effect_icon": "fg-hover-zoom",
			"image-viewer_caption_title_source": "",
			"image-viewer_caption_desc_source": "",
			"image-viewer_caption_alignment": "",
			"image-viewer_captions_limit_length": "",
			"image-viewer_custom_settings": "",
			"image-viewer_custom_attributes": "",
			"image-viewer_custom_class": "",
			"image-viewer_include_title": "",
			"image-viewer_lazyload": ""
		},
		"sorting": "",
		"retina": {
			"2x": "true",
			"3x": "true",
			"4x": "true"
		},
		"custom_css": "",
		"attachments": {
			"4172": {
				"url": "https://www.example.com/wp-content/uploads/2022/09/IMG_20220101_104712.jpg",
				"title": "Image 1 Title",
				"caption": "",
				"description": "",
				"alt": "Image 1 Alt"
			},
			"4171": {
				"url": "https://www.example.com/wp-content/uploads/2022/09/IMG_20220101_114947.jpg",
				"title": "Image 2 Title",
				"caption": "",
				"description": "",
				"alt": "Image 2 Alt"
			},
			"4173": {
				"url": "https://www.example.com/wp-content/uploads/2022/09/IMG_20220101_104720.jpg",
				"title": "Image 3 Title",
				"caption": "",
				"description": "",
				"alt": "Image 1 Alt"
			},
			"4175": {
				"url": "https://www.example.com/wp-content/uploads/2022/09/IMG_20220101_114934.jpg",
				"title": "Image 4 Title",
				"caption": "",
				"description": "",
				"alt": "Image 4 Alt"
			}
		}
	}
]

Nice. Where could I enter the Ids? When I create a Gallery, I’m taken to the block editor where I can upload Media or select from the Media Library. I haven’t found an input field for Media-Ids, yet.

Thanks for that! All my FooGalleries have now been migrated to SimpLy.