Ergodox has a design where the keyboard can sit on 3 adjustable legs, and you can get both a downward angle and tenting out of that.
The downside is that you really need to get your desk way low for your arms to naturally "droop" down over that. I have a motorized sit-stand desk I bought specifically after comparing specs on how low the desk surface can go, and the position that's low enough while seated is basically as low as my knees will let it go. A separate keyboard tray would be great but they rarely have room for the footprint and height of a tented keyboard with a touchpad in the middle.
Standing up, it's a lot easier to find a good height.
I don't think glue will hold them well enough. There's a metal thread in the keyboard for a reason. The angle is adjustable and tightening the nut locks the foot at that angle.
The downside is that you really need to get your desk way low for your arms to naturally "droop" down over that. I have a motorized sit-stand desk I bought specifically after comparing specs on how low the desk surface can go, and the position that's low enough while seated is basically as low as my knees will let it go. A separate keyboard tray would be great but they rarely have room for the footprint and height of a tented keyboard with a touchpad in the middle.
Standing up, it's a lot easier to find a good height.
https://ergodox-ez.com/