Combining/Merging two apple ids

No, there is no way to merge Apple IDs. You could create a new Apple ID, but the result might not be satisfactory to you. Be very cautious before you do so; the information below may not solve your problem completely enough.

See, for phone 1, How to create a new Apple ID https://support.apple.com/en-us/HT204316 See the data implications below.

Some of these things will apply to your situation even if you are not changing your Apple ID: What to do after you change your Apple ID or password https://support.apple.com/en-us/HT204071

 Keep in mind that some things available under a first Apple ID will not be available under a new Apple ID. For example, you won’t be able to transfer anything purchased from the App and iTunes Stores to the new ID. And, there are other issues to be addressed.

See:

what Eric Root say on this matter here:  hthttps://discussions.apple.com/thread/7452747 and

what Winston Churchill says about it here: https://discussions.apple.com/thread/7452747

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You also may be able set up family sharing between the IDs to share purchases made with them. See:

Family Sharing  https://support.apple.com/en-us/HT201060

Set up Family Sharing https://support.apple.com/en-us/HT201088

When changing to the new ID, there may be some data loss, but you can minimize it. If syncing photos with iCloud, ensure Optimization is turned off in Settings/Your Name/iCloud/Photos and/or in Photos/Preferences/iCloud. Then make sure full resolution photos are on the device/computer. When signing out of iCloud, if asked whether you want to retain data, choose yes. Messages conversations will be lost if they are addressed to the ID. See the article below for other places that the old ID should be removed. See Winston Churchill's response in the below discussion. Also set up Family Sharing to keep access to your apps/purchases. 

 How to switch Apple IDs on your iPhone or iPad.      

How to transfer all files from one iCloud account to another.       

What to do after you change your Apple ID or password - Apple Support.      

Family Sharing.         

Family Sharing - Set up.        

I see what your link is now. It's pretty hard not to duplicate some things sometimes especially if a link (or links) are given that don't give much information about what is being linked. Also, sometimes not duplicating something would reduce an answer's coherence. I just ignore it if someone duplicates something in my posts. I just assume each is trying to do their best in providing the best answer they know how to make. When I make a special point of not duplicating, I often reference what others already have said.

There’s a similar community post to this and it seems to have been answered :

https://discussions.apple.com/thread/8064616

Your link to what I posted and what Winston Churchill posted is the same discussion.

Thankyou so helpful

Thanks so helpful