Although not the solution some of you might be looking for, here's a little workaround that may help in some situations.

ctrl + a // select all
ctrl + l // lock - first time locks everything
ctrl + l // unlock - second time unlocks everything

Please make like Illustrator!

Lock: cmd + 2
Unlock All: opt + cmd + 2

Hide: cmd + 3
Show All: opt + cmd + 3

It’s almost impossible to works without an Unhide all hidden objects command. There are various way to implement it.
- Add Unhide menu

If nothing is seleted, unhide all hidden object in the document
If an artboard name is selected, unhide all hidden objects on that artboard only

also, add Shit-Clic on eye in the layers to unhide all on that artboard.

Currently using version 28.9.12.2.

This was requested in a previous entry (link below). That entry was marked as "feature-completed" but the actual request was not actually addressed.

https://adobexd.uservoice.com/forums/353007-adobe-xd-feature-requests/suggestions/17620078-unhide-all-layers

Unhide all hidden objects, a menu item and shortcut, just like in Illustrator.

It's exhausting to unlock every element in a design … Sometimes it's a lot of element.

Having the ability to Unlock all and Unlock all would be massively useful! I would add that in addition to the hot-keys, it would be nice if they were in the select menu (right click to view options) with the other lock option.

Please made hot keys for "Lock/Unlock All" & "Hide/Unhide all" like it realise in Illustrator - cmd + 2 (cmd + alt + 2) & cmd + 3 (cmd + alt + 3)

Allow hot keys for hide/unhide Layout working not depending select you page or not!

Create rules and guides, please! and hot keys for it too!