Networks like Bitcoin follow a set of rules and processes, including ways to deal with problems. There are a few mechanisms in place which, intentionally or not, can result in funds being stuck as pending or not appearing altogether, which can be worrying at first. Fear not, however — most of the time it can be fixed quite easily.
If you have had an issue sending Bitcoin or you seem to have lost your cryptocurrency in a transaction, it may be the case that one of these common problems has been encountered. Using Trezor Suite with your hardware wallet, it is now much easier to increase the fee for a transaction, even if it has already been sent, so you can pay a reasonable price even when the network is busy.
Here is how to use RBF in Trezor Suite: Replace-by-fee (RBF) - Trezor Wiki