Upgraded but Safari tabs did not transfer

Thanks for the help. I have already transferred all data to the new iPad. I have a backup of the old iPad on my MBP.

1. Can I connect the new iPad to my MBP to rescue the tabs?
2. If not, can I back up the old iPad to the cloud and then get the tabs onto my new iPad. I believe that they can share data via the cloud? Is that correct, as I have never used it before?
3. How can I tell how much space I would need on the cloud?

P.S. Can I attach my new iPad to my MacBook Pro (where the backup is located) and restore the old iPad backup to the new one? Would this work?

Or could I make an iCloud backup from the old iPad to save the tabs? I don't usually use iCloud.

But can I do this retro actively? I saw iClous Safari 10 mins ago, but now I cannot find it. It also says I cannot back up because of lack of space, although I don't have much data and don't want to change the storage plan as I usually backup to my MacBook Pro anyway.

I have found the tabs. If I press and hold the + button (top right of the Safari screen) I see all the tabs where are designated as "recently closed."

Does anybody know how I can re-open them all please? iOS 18.4

There is some confusion here. My original post said:

"I just upgraded to an iPad 6 running iOS 18.4 but my many (work in progress) open tabs in Safari did not transfer. 

Is that normal and can I rescue them please? I made a backup from the old iPad just prior to transfer."

For clarification, the backup was made to my MBP. I have never used iCloud and thought it might be a solution to rescue my tabs if I now backup the old iPad to iCloud. I understand that iCloud data is shared, so would I then be able to find the missing tabs on my new iPad?

Since my OP, I found some "recently deleted" tabs, but they are not what I need.

I have now upgraded to more iCloud space, so could this help?

And will it help if I re-set the new iPad and start all over again? Will the open tabs from the old iPad be shown on the new iPad after I transfer everything again?

I am sceptical because both iPads were connected via bluetooth before I set up the new iPad and did the original transfer yesterday.

Thanks in advance.

Thanks, but that presumably means the new iPad has to be online and connected to iCloud or can I connect it later? How does iCloud know which iPad has the correct tabs open? So that it sends all open tabs from iPad 1 > iPad 2? I do not want iPad 2 to overwrite all the open tabs on iPad 1.

OK. Backup from iPad #1 to iCloud completed. iPad #2 now connected, but the Safari tabs have not been transferred or merged, as I was hoping.

I'm puzzled as to why iCloud would know to sync all data without specific instructions? Just imagine that both iPads belonged to different people within a company or different family members. In my case, I want them the same, but how does iCloud know that?