If you can withdraw the capital you are releasing in small amounts when you need it or if you have to take it as a single lump sum. The advantage of being able to withdraw money in smaller amounts is that you only pay interest on the amount you have withdrawn. If you want, yes, you can, absolutely. However, it is important to reiterate how a lifetime mortgage with capital release is designed to remain in effect for the rest of your life or as long as your health allows you to continue living in your primary residence.
If you have taken out a capital release plan, you may be concerned that selling your home isn't an option. Fortunately, you can still move or downsize. Once you have paid your mortgage, you will have 100% of the equity of your property; in other words, it is your entire property. But as the value of your home increases, there is no benefit to you in cash, as that extra value will not be converted into cash until the property is sold.
If you never sell, only your wealth and your beneficiaries will be better off.