Sadly, there has always been a few issues with that table set on the board since their
initial release.
There are several bug threads on the topic (
bugs 1,
bugs 2,
bugs 3). The last time these specific items were relisted in a sale Mod Pixie flagged it with the team again but, sadly, I don't think a fix was ever confirmed.
The first issue is not being able to get the stools out of storage and onto the board.
The workaround is to place the tables as usual but place the chairs away from the tables - in a totally different area. After the stools are showing on the board, they can then be dragged over to the Sweet Blue tables.
The second issue is the bots don't see the chairs as being empty and open for seating even when they're perfectly placed.
The way to get around that glitch is to have the stools placed either above (@ the 12 o'clock position) or to the right of the tables (@ the 3 o'clock position). Part of this issue is also in the rotation so I try to not rotate them at all and avoid that risk.
Please note that you may have to fiddle around with the stools to see what positions/rotations work for your bakery. Since this is a workaround to a bug I can't be 100% sure my methods will apply to everyone else's bakeries. Others have said this does work but I never got concrete answers as to whether or not their chair placement had to be the same as mine so it's a toss up, lol.
If you'd like to add your voice to the issue, I'd recommend the 2023 thread which I've labeled as bugs 1 above.
Hope this helps you at least be able to place your items but I do wish I had better news for you